Biology Questions and Answers Form 2 - Biology Form Two Notes

Biology Questions and Answers Form 2 - Biology Form Two Notes

Click Here - Free KCSE Past Papers » KNEC Past Exams » Free Downloads » KCSE Papers & Marking Schemes

K.C.S.E Online Revision

Biology Questions and Answers Form 2

KCSE Revision Questions and Answers

Biology Notes Form 2

1. a) i) Define transport

  • Movement of substances from one pan of the body to another

    ii) Explain the necessity of transport in plants and animals

  • make nutrients move from one point to another

  • movement of respiratory gases i.e. oxygen and carbon IV oxide

  • elimination of metabolic wastes

  • movement of hormones

  • movement of water

  • movement of salts

  • movement of enzymes

    b) i) Describe the structure and function of root hair

  • root hairs are found near the root tip

  • they are cells with elongated finger-like projections which are in contact with soil particles

  • they are permeable to water and mineral salts hence are used to absorb Water and mineral salts

  • There large number offers a large surface area for absorption of water and mineral salts.

    ii) State ways in which the root hairs are adapted to their functions

  • the root hair is long/narrow/numerous to increase surface area for absorption of water and mineral salts

  • many mitochondria in cytoplasm to supply energy for active transport of mineral salts

  • are thin walled to speed up rate of absorption of Water and mineral salts

    c) i) Compare the internal structure of a dicotyledonous root and a monocotyledonous root

    Monocot root

    ii) State the similarities and differences between a dicotyledonous and monocotyledonous root

    Similarities

  • both used for anchorage and absorption of water and mineral salts

  • both have root hairs, epidermis, pericycle, cortex, endodermis and vascular bundles

  • (xylem and phloem)

  • both may be used to store food/storage organs

    Differences

    Monocotyledonous

  • phloem and xylem are arranged in ring form alternately

  • pith present

    Dicotyledonous

  • phloem lies between radial rays of central xylem(star shaped)

  • pith absent

    iii) Compare the internal structure of a monocotyledonous and dicotyledonous stem

    Monocotyledonous stem

    Dicotyledonous stem

    i) Give the similarities and differences between a monocotyledonous and dicotyledonous stem

    Similarities

  • both are used for protection

  • both conduct water, salts and food

  • both have epidermis, cortex, pericycle and vascular bundles

    Differences

    Monocotyledonous

  • vascular bundles are many and scattered

  • some have hollow pith or pith is absent

  • no cambium layer therefore cannot
  • undergo secondary growth very
  • little cortex

    Dicotyledonous

  • vascular bundles are few and arranged in a concentric ring near the epidermis

  • pith large and well developed

    State the differences between the internal structure of a root and a stem.

  • no cambium layer therefore cannot

  • undergo secondary growth

  • very little cortex

  • presence of cambium therefore
  • undergoes secondary growth

  • cortex has several layers of cells

    c) i) Name the transport structures of a flowering plant

  • xylem vessels and tracheids transport water and mineral salts from the soil

  • Phloem vessels translocate manufactured food from leaves to other parts of the body

    ii) State the ways in which xylem vessels are adapted to their function

  • lignified/thickened to prevent collapsing

  • narrow to facilitate capillary

  • no cross walls for continuous flow/column of water

  • have bordered pits for lateral movement of water

    a) i) Why do flowering plants need water?

  • photosynthesis

  • transport

  • turgidity w h helps in plant support

  • solvent i.e. medium for chemical reactions

  • cooling effect during transpiration

  • seed germination

    ii) Describe the movement of water from the soil to the leaves of a tall plant

  • Soil water exists as a thin film in the soil, between soil particles

  • the concentration of cell sap of root hair is greater than that of the surrounding solution in the soil, thus drawing the Water molecules across the cell wall and cell membrane into the root hair by osmosis

  • water drawn into the root hair cell dilutes the cell sap making it less concentrated than that in the adjacent cortex cells of the root

  • due to osmotic gradient water moves from the root hair cells into the cortex by osmosis, from cell to cell by osmosis, across the endodermis by active transport into xylem vessels of the root that conduct water into xylem vessels of the stem into xylem vessels of the leaves

    Stem

  • Once in the stem water moves up the plant aided by the narrowness of the xylem vessels (capillary), root pressure, attraction of water molecules to each other (cohesion).

  • Attraction of water molecules to the Walls (adhesion) from the stem water enters the xylem of leaves

  • water moves in the xylem vessels of the stem in a continuous (uninterrupted) water column up to the tree leaves

    Leaves

  • once in the leaves water moves into the mesophyll cells by osmosis as water vaporizes from the spongy mesophyll cells their sap becomes more concentrated than the adjacent cells as the result water flows into the cell from other surrounding cells which in turn takes in water from xylem vessels within the leaf veins this creates a pull(suction force) called transpiration pull that pulls a stream of water from xylem vessels in the stem and roots .

  • The transpiration pull maintains a continuous column of water from the roots to the leaves.

    iii) Name the process by which mineral salts enter into a plant

  • active transport

  • diffusion

    i) Explain the forces that make water and mineral salts move through a plant

  • mineral salts are taken up due to diffusion because of the concentration gradient between the mineral ions in sap and those in soil solution

  • active transport involves energy in form of ATP due to respiration which forces mineral salts through a plant against a concentration gradient

  • water moves by osmosis through a semi-permeable membrane of root hairs and between cells of stem

  • in stem water moves by cohesion(attraction of water molecules to each other)

  • it also moves by adhesion(attraction of water molecules to walls)

  • capillarity is due to narrowness of xylem vessels

  • transpiration pull occurs When Water vapour evaporates from sub-stomatal chambers into the air

  • root pressure is a force that pushes Water up the stem from the roots and causes guttation /exudation

    ii) Explain the uptake of mineral salts by plants

  • plants require mineral salts for metabolism and proper functioning of their bodies

  • mineral salts are taken up from the soil into the root hairs in form of solution by active

  • transport which requires energy

  • active transport involves substances called carriers taken up together with water and are then carried to the stems and leaves

  • the main process involved in uptake and movement of mineral salts is active transport

    b) i) What is transpiration?

  • loss of water from plant to the atmosphere

    ii) Name the sites through which transpiration takes place in a plant

  • stomata (stomatal transpiration)

  • lenticels (lenticular transpiration)

  • cuticle(cuticular transpiration)

    iii) State the importance of transpiration to plants

  • cooling the plant

  • transport of water

  • transport of mineral salts

  • excretion of excess Water from plants

    excess transpiration causes wilting

    i) Explain the structural factors that affect the rate of transpiration in plants

  • number of stomata i.e. the more the stomata the higher the rate and vice versa

  • turgidity of the guard cells which control the opening and closing of stomata when they are open transpiration rate is high

  • size of leaves where the larger the surface area the higher the rate of transpiration

  • leaf fall leads to lower rate of transpiration and also drying of leaves reduces rate of transpiration

  • Thin cuticle reduces distance through Which water vaporizes hence increase transpiration rate. Absence of cuticle also increase rate of transpiration

    ii) Explain the environmental factors that affect rate of transpiration in plants

  • high temperature increases rate of transpiration and low temperature reduces the rate

  • humidity when high increases rate and when low reduces the rate

  • transpiration rate is higher in moving air (wind) than in still air

  • high light intensity increases internal temperature hence higher rate of evaporation leading to higher rate of transpiration

  • availability of water in the soil leads to more absorption hence more loss to the atmosphere

  • atmospheric pressure when high leads to more evaporation and when low leads to low rate evaporation of water

    iii) State the structural differences between xylem vessels and sieve tubes

  • sieve tubes have cross wall while xylem vessels have none

  • xylem vessels are lignified while sieve tubes are not

  • Sieve tubes have cytoplasm elements while xylem vessels have none.

    iv) State the adaptations of plants which enable them to reduce water loss

  • thick waxy cuticle

  • reduced leaf size/thorns/spines

  • shedding of leaves

  • Sunken stomata. Water vapour accumulates in the depression of stomata lowering the water vapour concentration gradient leading to lower rate of evaporation

  • rolling of leaves

    v) State the factors that cause increase in the rate of transpiration from leaves

  • increased light intensity

  • low relative humidity

  • temperature

    vi) Explain how drooping of leaves on a hot sunny day is advantageous to a plant

  • reduces surface area exposed to sun reducing cuticular transpiration

    c) Explain how aquatic and terrestrial plants are adapted to deal with problems of transpiration

    a. Mesophytes

  • they grow in soils with enough water

  • water loss is perfectly balanced by absorption of more from the soil

  • no special adaptations

    b. Xerophytes

  • they grow in dry conditions

  • root grow very deep to absorb water

  • succulent/fleshy leaves to store water

  • few stomata which are sunken

  • thickened waxy cuticle

  • leaves are hairy and often folding

  • some leaves are needle-like/spines or scales

  • leaf surfaces are reduced i.e. small leaves

  • all these adaptations are to reduce water loss

    c. Hydrophytes

  • plants that grow in water

  • presence of sclereids

  • leaves are broad

  • leaves have many stomata on upper side only (none on the lower surface)

  • some leaves float on water

  • absence or reduced leaf cuticle

  • large air spaces

  • some leaves are submerged

  • poorly developed or reduced vascular bundles

    d) i) What is translocation

  • transfer of manufactured food substances to the parts where they are required

    ii) Name the tissue which is responsible for translocation of manufactured food in flowering plants

  • phloem tissue

    iii) Name the processes that bring about the translocation of manufactured food

  • active transport

  • Diffusion

  • Mass flow

  • Cytoplasmic streaming

    iv) Draw a labeled diagram to represent phloem tissue

    ii) State the functions of the labbeled structures cytoplasmic strands

  • translocation

    Companion cell

    supply nutrients to sieve tube element

  • supply energy for translocation

  • regulates activities of tube cells/elements

    Sieve tubes element

  • conduct food down the stem

    iii) name the compounds that are translocated in phloem

  • sugars

  • amino acids

  • hormones e.g auxins

  • oils/lipids

  • resins

  • vitamins

    Describe an experiment you would carry out in order to demonstrate that phloem transports manufactured food substances in a plant

    a. Ringing experiment

  • cut a ring in the bark including the phloem from the stem of a woody plant

  • phloem is found next to or just beneath the bark

  • observe daily for some time(more than three weeks)

  • a swelling of the bark appears above the ring

  • this is due to accumulation of food from leaves

  • the bark of a second similar plant is removed carefully leaving the phloem intact

  • a swelling does not appear

    ii) Use the radio-active tracers

  • plant is exposed to carbon containing radio-active carbon C14

  • C14 is found in the end products of photosynthesis

  • It is finally detected in phloem

  • C14 is found to move in both directions

    iii) Collecting exudate from stylets of aphids

  • aphids feed on certain plant phloem using their stylets

  • aphid mouth parts are dissected using a sharp razor

  • exudes from the mouth parts are collected and then analyzed

  • sucrose is found to be a major component of the exudates

  • this proves that phloem translocates manufactured food substances

    e) Describe an experiment you would carry out to demonstrate that xylem transports water

    i. Either

  • cut a stem of a young plant or twig of a tree under water

  • or else uproot a young herbaceous plant and wash the soil gently

  • put some water in a beaker and add a dye i.e. eosin or red ink and place the cut stem or young plant in a beaker

  • leave for time e. g. between 20 minutes and one hour

  • cut a thin section of stem or leaf

  • mount it on a slide and examine under a microscope

  • observe and note the distribution of the dye or ink

  • the dye appears only in the xylem vessels

    ii. OR

  • use radio-active tracers, C14 in form of carbon

  • ring a plant then put it in a container containing radio-active phosphorous solution

  • The radio-active phosphorus is later detected in the leaves.

    2. a) i)List the components of animal transport systems

  • system of blood vessels in which materials are circulated round the body

  • blood, a fluid medium which contains dissolved substances and cells

  • the heart, a pumping mechanism which keeps blood in circulation

    ii) Distinguish between closed and open circulatory systems

  • closed system has blood vessels through which blood moves eg vertebrates

  • open system has no blood vessels hence blood is in direct contact with tissues e. g arthropoda

    iii) What are the advantages of the closed circulatory system over open circulatory system?

  • Closed system has continuous vessels hence able to generate high pressure

  • Circulates blood over longer distance

  • Circulates blood at a faster rate

  • Efficient transport of nutrients and waste products

  • Animals are more active

    iv) Distinguish between single circulatory system and double circulatory system Single circulatory

  • blood passes through the heart once in a complete circuit of the body

  • Double circulation

  • blood enters the heart twice in a complete circulation

  • Pulmonary circulation from the heart to lungs and back

  • Systemic circulation from the heart to body systems and back

    b) i) Describe the general layout of the transport system in mammals

  • blood which is a fluid tissue of the body carrying food substances, oxygen, carbon IV oxide and metabolic wastes

  • arteries which are elastic tubes carrying blood from the heart to cells

  • veins which are blood vessels carrying blood away from the cells to the heart

  • capillaries which are extremely numerous and are microscopic channels connecting arteries to veins

    ii) Describe the structure and function of the mammalian heart

  • the heart is a four-chambered hollow muscle located in the thoracic cavity

  • it consists of two small receiving chambers, the atria(auricles) and two larger pumping chambers, the auricles

  • the left ventricles is the most powerful and has the thickest walls

  • this is because it is the chamber which pumps blood throughout the body

  • each time it contracts, blood is forced out into the elastic arteries(aorta)

  • blood moves on to the capillaries

  • from capillaries blood moves to veins and back to the heart through the vena cava

  • from vena cava it enters into right auricle which contracts and pumps blood into the right ventricle

  • right ventricle pumps blood into the lungs through the pulmonary artery

  • blood releases carbon IV oxide to lungs and picks oxygen then returns to left auricle

  • left auricle pumps blood into left ventricle

  • left ventricle then pumps blood into the aorta and into arteries, starting the process all over again

  • both auricles contract simultaneously while both

    iii) Explain how the mammalian heart is adapted to performing its functions

  • the heart is made of muscles that contract and relax synchronously without requiring nervous stimulation

  • nerve supply however, determine contraction strength and frequency

  • the heart is divided into four chambers

  • The right atrium is connected to the right auricle. It receives blood from the whole body.

  • The blood is pumped from the left atrium to the right ventricle

  • To avoid flow back into the right atrium, a valve is present between the two chambers

    the tricuspid valve

  • The right ventricle pumps blood to the lungs

  • This is facilitated by the presence of pulmonary artery

  • A valve is also present to avoid blood flowing back from the pulmonary artery to the right ventricle

  • Blood from the lungs enters the heart through the pulmonary vein into the left atrium.

  • When the left atrium contracts, blood flows into the left ventricle

  • Blood will not flow back into the left atrium because of the presence of bicuspid valve(mitral)

  • The left ventricle is connected with the aorta and when it contracts, blood flows into the aorta for distribution into the whole body

  • The heart muscle surrounding the left ventricle is thicker than that surrounding the right ventricle to be able to generate enough pressure to push blood to the whole body

  • A pace-maker is present in the heart muscle to initiate and synchronise contractions.

  • For the heart muscle to be well nourished and be provided with enough oxygen and carbon IV oxide removal, it is supplied with blood by the coronary arteries and drained by the coronary veins

    iv) Explain why blood leaving the lungs may not be fully oxygenated

  • under ventilation of the lungs

  • blockage of alveoli (air sacs)

  • high cardiac frequency i.e. high rate of pumping of blood in the heart

    e) Describe the structure and functions of the blood vessels

    i. Arteries

  • carry away blood from the heart

  • carry oxygenated blood except pulmonary artery which takes blood from the heart to lungs for oxygen

  • have thick, muscular walls

  • are elastic

  • have narrow lumen

  • all these adaptations are required to withstand high pressure caused by heartbeat

    ii. Capillaries

  • link arterioles and venules to arteries and veins

  • small in diameter to increase pressure resistance for materials to filter out

  • thin walled as they consist of a single layer of cells to allow diffusion of substances e.g leucocytes to tissues

  • thin walled to allow presence of intercellular spaces

  • large number i.e. numerous to provide a large surface area for exchange of materials

  • have sphincter muscles at the junction of the arterioles and capillaries to control movement of blood into them

  • lie close to the body for easy exchange of materials

    iii. Veins

  • carry blood back to the heart

  • all carry deoxygenated blood except pulmonary vein that carries blood from the heart to lungs

  • have thinner Walls than arteries

  • have valves to prevent back flow of blood

  • have wide lumen

    b) i) State the ways in which the composition of blood in the pulmonary arterioles differs from that in the pulmonary venules

    pulmonary arterioles

  • deoxygenated
  • high carbon iv oxide
  • low oxygen
  • more nutrients

    pulmonary venules

  • oxygenated
  • low carbon iv oxide
  • high oxygen
  • less nutrients

    ii) Give the reasons why pressure of blood is greater in the arterioles than I the veins of mammals

  • blood is pumped to the arteries by the heart at high pressure

  • blood pressure in veins is reduced by capillary resistance

  • arteries have narrow lumen which maintains high pressure/veins have wide lumen which reduces pressure

  • arteries have more/thicker muscular walls which generate pressure/veins have less/thinner muscular walls which reduce pressure

    iii) Name the common heart diseases in humans

  • thrombosis

  • antheroma

  • arteriosclerosis

  • varicose veins

  • cerebral vascular thrombosis

    c) i) State the functions of mammalian blood

  • transport of substances

  • defense against diseases

  • clotting

  • temperature regulation

    ii) Describe how mammalian blood components carry out their functions Plasma

  • transport dissolved food substances like glucose, amino acids, fatty acids and glycerol from small intestines to liver and other body tissues

  • transports hormones, enzymes from secretory glands to tissues when required

  • transports carbon IV oxide to lungs and urea from tissues to the kidneys

  • distributes heat

  • bathes the tissues allowing for exchange of materials

  • contains protein fibrinogen and pro-thrombin which take part in blood clotting

    Red blood cells (Erythrocytes)

  • transports oxygen from the lungs to body tissues in form of haemoglobin

  • transport carbon IV oxide from body tissues to the lungs in form of bicarbonates

    White blood cells (leucocytes)

  • engulf foreign bodies

  • produce antibodies for defense against disease

  • produce antitoxins which neutralize bacterial toxins

    Blood platelets (thrombocytes)

  • produce an enzyme called thrombokinase/thromboplastin necessary for blood clotting

  • prevents loss of blood, water and mineral salts

    iii) State the Ways in which the red blood cells are adapted to their functions

  • many per unit volume hence carry more oxygen and carbon IV oxide

  • biconcave in shape to provide large surface area for absorption of oxygen and carbon IV oxide

  • absence of nucleolus hence more haemoglobin to carry sufficient oxygen and carbon IV oxide

  • alter shape to be able to pass through the narrow lumen of capillaries to deliver or supply oxygen and carry away carbon IV oxide

  • have haemoglobin with high affinity for uptake of oxygen and carbon IV oxide

    iv) State the structural differences between a red blood cell and a white blood cell.

    Red blood cells

  • has hemoglobin

  • smaller size

  • lacks nucleus

    White blood cells

  • not pigmented

  • larger size

  • nucleated

    v) State the functional differences between a red blood cell and a White blood cell

    Red blood cell

  • Transports oxygen and carbon IV oxide

    White blood cell

  • Protects body against harmful pathogens

    How does the heart increase blood flow to some parts of the body during exercise

  • stronger contractions

  • faster contractions/heartbeat

    Explain how oxygen and carbon Iv oxide are transported in the blood

    Oxygen

  • oxygen concentration is higher in lungs(alveoli) that in blood

  • oxygen in the alveoli dissolves in the film of moisture and diffuses through thin epithelial and capillary walls into plasma and red blood cells

  • the oxygen combines with haemoglobin to form oxyhaemoglobin

  • blood then becomes oxygenated

  • blood from lungs then travels to all body tissues where the oxyhaemoglobin breaks down to form oxygen and haemoglobin

  • haemoglobin is transported back to the lungs to collect more oxygen while the oxygen in capillaries diffuses into body cells for respiration

  • respiration produces carbon IV oxide

    Carbon IV oxide

  • carbon IV oxide produced during respiration diffuses out of cells into blood plasma and red blood cells due to concentration gradient

  • carbon IV oxide and water fonn carbonic acid carbamino compounds with haemoglobin

  • in the presence of carboxyl anhydrase enzyme, hydrogen carbonate is carried in blood to the lungs

  • in the lungs the hydrogen carbonate dissociates to liberate carbon IV oxide which diffuses into alveolar cavity due to concentration gradient

  • from alveolar space carbon IV oxide is expelled during expiration

    Most carbon IV oxide is transported from tissues to lungs within the red blood cells and not in the blood plasma. Give the advantages of this mode of transport.

  • PH of blood is not altered/homeostasis is maintained

  • Within the red blood cell is an enzyme, carbonic anhyrase which helps in fast loading(combining) and offloading of carbon (iv) oxide

    d) i) what is blood clotting?

  • process in which blood components clump together to prevent loss of blood from an injured/cut vessel

    ii) Name a protein, vitamin, an enzyme and a mineral element involved in blood clotting

  • Protein — fibrinogen/prothrombin

  • Vitamin - k/quinine

  • Enzyme — thrombokinase/thromboplatin/thrombin

  • Mineral element — calcium

    iii) describe the blood clotting process

  • enzyme thromboplastin produced in the platelets of damaged tissues converts plasma

  • protein prothrombin into thrombin in the presence of calcium ions

  • thrombin converts another plasma protein fibrogen into fibrin in the presence of vitamin K

  • fibrin is insoluble

  • fibrin forms fibres which form a meshwork that forms a clot

  • prothrombin thromboplastin thrombin

  • calcium ion

  • Fibrinogen thrombin fibrin clot

  • vitamin K

    iv) State the role of blood clotting on wounds

  • prevents blood/body fluids from being lost

  • conserves water and salts

  • prevents entry of microorganisms/pathogens

  • regulates body temperature

  • enables wound to heal faster

    v) Explain why blood flowing in blood vessels does not normally clot

  • Presence of anticoagulant in blood

  • e) i. list the major types of human blood groups

  • O, with neither B nor A antigen

  • AB, with both A and B antigens

  • A, with type A antigen

  • B, with type B antigen

    iii. Explain the meaning of :

    Universal donor

  • a person who can donate blood to any other blood group without agglutination/clumping

  • this is usually blood group O

  • however this person cannot receive blood from other blood groups except group O

    Universal recipient

  • can receive blood from all blood groups without agglutination

  • this is usually blood group AB

  • however, can only donate blood to group AB

    iii) What is the difference between rhesus positive and Rhesus negative blood samples?

  • rhesus positive blood has the Rhesus (Rh) antigen

  • rhesus negative lacks the Rhesus antigen

    vi) What is blood transfusion?

  • Introduction of blood from one person to another

    v) Under what conditions would blood transfusion be necessary in people?

  • during accidents

  • during surgery in hospitals

  • bleeding mothers when giving birth

    vi) How can low blood volume be brought back to normal?

  • transfusion

  • taking fluids

  • eating iron rich food/taking iron tablets

    How may excessive bleeding result in death?

  • Anaemia/low blood volume/loss of iron/low red blood cells count/low haemoglobin leading to low oxygen, loss of nutrients and dehydration.

    State the precautions that must be taken before blood transfusion

  • blood must be disease free

  • sterilized equipment must be used

  • blood of the recipient and that of the donor must b compatible to both ABO and rhesus factor

  • Fresh blood must be used.

    j) i) What is immunity?

  • Resistance to disease by organisms

    ii) Distinguish between natural and acquired immunity

  • natural immunity is inherited/transmitted from parent to offspring/inborn/innate

  • Acquired immunity is developed after suffering from a disease or through vaccination.

    iii) What are allergic reactions?

  • Excessive sensitivity and reaction of an individual to certain substances in environment e.g. dust, pollen, perfumes, smoke etc.

    vi) How does an allergic reaction occur?

  • the substances act as antigens

  • an antigen-antibody reaction occurs on surface of cells

  • the cells release a substance called histamine

  • the histamine causes irritation, itching and may stimulate nasal discharge

    ii) State the role of vaccination against certain diseases

  • protect body against infectious diseases

  • prevent spread/transmission of certain diseases

  • diseases for which vaccination is given include tuberculosis, poliomylitis,measles,
  • whooping cough, diphtheria

    3. a) i) What is gaseous exchange?

  • The continuous exchange of oxygen and carbon Iv oxide between the organism and environment

    ii) Why is gaseous exchange important to organisms?

  • to supply oxygen necessary for energy production

  • to remove carbon IV oxide produced during respiration

  • To remove Water vapour.

    b) i) name the structure used for gaseous exchange by plants

  • stomatal pores/stomata

  • lenticels

  • cuticle

  • pneumatophores

    ii) Briefly describe the structure of stomata

  • are minute pores found in leaf epidermis

  • each consists of a slit-like opening

  • Each is bordered by two large, bean-shaped guard cells.

  • Guard cells contain chloroplasts, unlike the other epidermal cells which enable photosynthesis to occur

  • Inner walls of guard cells are thicker than the outer cells

    iii) State the factors which affect stomatal opening

  • water which when low stomata close and when high stomata keeps open

  • light as stomata open in bright light and close in darkness

  • temperature

    iv) Name the theories suggesting the mechanism of opening and closing of stomata

  • interconversion of starch and sugar

  • pH theory

  • mineral ion concentration

    v) Describe the mechanism of opening and closing of stomata

  • stomata close at night and open during daytime

  • This comes about due to changes in turgidity as a result of pH changes in guard cells.

  • In the dark carbon dioxide accumulates in the intercellular spaces

  • This raises concentration of carbonic acid

  • The pH drops (pH lowered)

  • Enzymes convert sugar into starch in guard cells

  • Osmotic pressure in guard cells is lowered

  • Water moves out of guard cells by osmosis making cells lose turgidity hence become flaccid

  • The stomata close

  • During day time there is photosynthesis hence the production of sugar, carbon IV oxide concentration is lowered, pH increases, guard cells become turgid causing stomata to open.

  • During the day potassium ions concentrate in guard cells, raising their osmotic pressure and causes then to open

  • In the night the concentration of potassium ions decreases increasing osmotic pressure in guard cells therefore causes stomata to open.

    i) What is the advantage of having stomata open during daytime and having them closed at night?

  • opening in the daytime allows diffusion of carbon IV into the leaf for photosynthesis to take place and allows diffusion of oxygen out of the leaf

  • transpiration also takes place, thus cooling the leaf and facilitating uptake of water and mineral slats

  • Closing in the night is to conserve water in the plant especially when there is not enough water available in the soil.

    c) i) State the ways in which leaves of plants are adapted to gaseous exchange

  • presence of stomata for faster gaseous exchange

  • intercellular spaces/air spaces in the leaf for movement/circulation of air

  • film of moisture around the surface of cells for easy diffusion

  • broad/flattened shape to increase surface area

  • thin lamina to reduce distance of diffusion

  • exposed to air for easy diffusion

    ii) Describe how gaseous exchange takes place in terrestrial plants

  • Gaseous exchange takes place in spongy mesophyll

  • During the day air diffuses into large air spaces of spongy mesophyll through stomata

  • The carbon iv oxide in the air diffuses into the photosynthesis oxygen is produced

  • Some of the oxygen diffuses out of the leaf through stomata

  • During the night air diffuses out of air spaces of spongy mesophyll

  • The air dissolves into film of moisture

  • The oxygen in the air diffuses into cells and is used in respiration during which carbon iv oxide is produced

  • The carbon iv oxide diffuses out of the leaf through stomata due to diffusion/concentration gradient

  • At night carbon iv oxide accumulates in the leaf since photosynthesis does not take place

  • Some gaseous exchange also takes place through cuticle

  • Gaseous exchange occurs through epidermis of young leaves and stems

  • The cork cells at lenticels are loosely packed

  • Gaseous exchange takes place between cork and atmosphere within the loosely packed cell

    iii) State the ways in which floating leaves of aquatic plants are adapted to gaseous exchange

  • stomata found only on upper dermis to allow efficient gaseous exchange

  • presence to aerenchyma tissues/large air spaces to enable it float/buoyancy/storage of air

  • absence of cuticle to enhance gaseous exchange

    iv) How is aerenchyma tissue adapted to its function?

  • has large airspaces which store gases/for gaseous exchange/buoyancy

    v) Explain stomatal distribution in plants of different habitats

  • land plants have their stomata mainly on the lower side to reduce water loss but if on both sides then upper side has very few

  • water plants, floaters, have stomata on upper side to enhance water loss

  • in dry areas, plants have leaves with sunken stomata to reduce water loss by transpiration
  • Plants in wet areas have stomata equally distributed on both sides.

    d) i) List the types of respiratory surfaces of animals

  • cell membrane in unicellular organisms e. g. amoeba

  • gills in fish

  • tracheal system

  • skin, buccal cavity and lungs in amphibians

  • lings in mammals

    ii) State the characteristics of respiratory surfaces in animals

  • moist thin walled/thin membrane/thin surface

  • Highly/richly vascularised/numerous blood vessels/Well supplied with blood vessels.

  • Large surface area

    iii) Describe gaseous exchange in protozoa

  • example is amoeba

  • small and have large surface area

  • oxygen diffuses into the organism and carbon IV oxide diffuses out into Water

  • simple diffusion of gases is enough to meet its respiratory requirements

    e) i) Make a labeled drawing of a fish gill

    ii) How is a fish gill adapted to its function?

  • large surface area due to many filaments

  • extensive vascularisation due to capillaries, for gaseous exchange

  • thin filaments to facilitate diffusion of gases

  • presence of rakers to filter solid particles

  • gill bar is bony, hard and firm to support the filaments and rakers and for attachment of filaments and rakers

    iii) Discuss gaseous exchange in bony fish

  • example is tilapia

  • the mouth opens and the floor of the mouth is lowered so that the volume in the mouth is increased and pressure is lowered

  • water then enters into the mouth cavity

  • the mouth is closed and the floor of the mouth raised so that the volume is reduced this raises the pressure, forcing water over gills and out through the operculum

  • As water passes over the gills oxygen diffuses due to concentration gradient (partial pressure) into the blood stream.

  • In the body tissues, carbon IV oxide diffuses into the blood (due to concentration gradient, and is transported to the gills and diffuses out into the water.

    iv) What is counter-flow system?

  • Where water in which the fish lives flows in opposite direction across the gill.

    vi) What is the advantage of counter-flow system?

  • maintains a diffusion gradient so that there is maximum uptake of oxygen

  • oxygen continues diffusing into blood and carbon iv oxide into Water

    f) i) Describe the mechanism of gaseous exchange in terrestrial insects

  • example is cockroach

  • air in the atmosphere contains oxygen

  • air is drawn into the body of the insect through the spiracles due to movement of abdominal muscles

  • these movements cause the opening of spiracles

  • air moves through the trachea to tracheoles

  • oxygen moves from the tracheoles into body cells by diffusion due to concentration gradient

  • carbon iv oxide in the tissues diffuses into tracheoles due to concentration gradient

  • From tracheoles carbon IV oxide moves into trachea and out through the spiracles into the air.

    ii) State how traceholes are adapted to gaseous exchange

  • thin walls of tracheoles

  • moist surface

  • large surface area due to numerous tracheoles

    g) i) What is breathing?

  • Any process which speeds up the rate of gaseous exchange between an animal and its surrounding.

    ii) Name the structures in humans that are used in gaseous exchange

  • nose

  • larynx

  • epiglottis

  • trachea

  • lungs

  • pleural membrane

  • pleural cavity

  • diaphragm muscles

    iii) Describe the mechanism of gaseous exchange in a mammal

    Breathing in

  • external intercostals muscles contract while internal intercostals muscles relax, raising then ribcage upwards and outwards

  • muscles of the diaphragm contract hence it flattens

  • the volume of the thoracic cavity increases while pressure decreases

  • higher air pressure in the atmosphere forces air into lungs through the nose

    Breathing out

  • external intercostals muscles relax while internal intercostals muscles contract, moving the ribcage downwards and inwards

  • muscles of the diaphragm relax hence the diaphragm assumes dome shape

  • the volume of the thoracic cavity decreases while pressure increases

  • the higher pressure forces air out of the lungs through the nose

    iv) Explain how mammalian lungs are adapted to gaseous exchange

  • large number of alveoli that increase surface area

  • moist inner surface of alveoli for dissolving oxygen/gases to facilitate exchange of gases

  • through alveolar cavities and blood

  • thin walls of alveoli to allow efficient/faster diffusion of gases

  • rich capillary/blood supply on alveolar surface to transport oxygen away from the lungs and carbon IV oxide to the lungs

    v) Name the features of alveoli that adapt them to their function

  • have large surface area/spherical shaped

  • numerous/many to increase surface area

  • one cell thick

  • moist surface for air to diffuse

  • highly vascularised/numerous capillaries

    vii) How is the trachea of a mammal suited to its function?

  • has a ring of cartilage which keeps it open at all times

  • cilia that move mucus/particles to the top of the trachea i.e. into larynx for removal

  • mucus to trap dust, solid particles and microorganisms

  • hollow for passage of air

    viii) State the advantages of breathing through the nose rather than through the mouth

  • nose has hairs to filter solid particles

  • it has mucus lining to trap dust particles

  • the nose has cells sensitive to smell for survival

  • it warms the air before it reaches the lungs

    ix) Give the conditions under which the carbon iv oxide level rises above normal in mammalian blood

  • vigorous exercise

  • emotions/stress

  • disease infection

    x) Explain the physiological changes that occur in the body to lower the carbon iv oxide level back to normal when it rises

  • heartbeat/cardiac frequency increases to pump blood faster carbon iv oxide from the tissues and supply more oxygen

  • ventilation rate/rate and depth of breathing increases to take more oxygen and remove carbon iv oxide from the lungs

  • arterioles to take in more oxygen and remove carbon iv oxide from the lungs

  • arterioles dilate leading to faster flow of blood to and from body tissues

    h) i)Describe the factors which control the rate of breathing in humans

  • breathing movements usually occur unconsciously

  • it is controlled by the medulla oblongata part of the brain situated at the breathing centre

  • medullar oblongata is in the brain

  • respiratory centre transmits impulses to the diaphragm through phrenic nerves

  • carbon iv oxide concentration in the blood determines the breathing rate

  • if carbon iv oxide is less, the brain is triggered to decrease breathing rate

  • cardiac frequency decreases and the arterioles constrict

  • therefore carbon iv oxide level is raised

  • this brings back to normal level of breathing and carbon iv oxide level increases/is more

  • the brain is triggered to increase breathing rate

  • cardiac frequency is increased

  • there is vasodilation of arterioles

  • carbon iv oxide level falls

  • therefore the normal level is attained and carbon iv oxide is removed faster

    ii) Name the respirator diseases

  • asthma

  • bronchitis

  • whooping cough

  • pneumonia

  • tuberculosis

    4. a) i) Define respiration

  • the oxidation/breakdown of food within cells to release energy

    ii) Explain the significance of respiration in living organisms

  • it yields energy (ATP)

  • this energy enables organisms to move, grow, excrete and reproduce

    iii) Where does respiration take place?

  • in the mitochondria

    b) i) Draw and label a mitochondrion

    ii) State the most important function of mitochondria

  • to produce Adenosine triphosphate (ATP) which is the energy source of the Whole cell

    iii) Give the functions of the labeled parts

    Outer membrane

  • controls what enters and What leaves mitochondrion

    Cristae

  • also called inner membrane

  • increase surface are for attachment of enzymes

  • this is Where cellular oxidation reactions occur

    Matrix

  • enzymes are located here

  • other reactions occur here

    c) Explain the roles of enzymes in respiration

  • they catalyse reactions i.e. speed up respiration

    d) i) What is aerobic respiration

  • respiration in the presence of oxygen

    ii) Give a word equation for aerobic respiration

  • glucose + oxygen - Water + carbon iv oxide + energy

    iii) What are the end products of aerobic respiration?

  • energy

  • carbon iv oxide

  • water

    e) i) What is anaerobic respiration

  • occurs in the absence of oxygen e. g. yeast and certain bacteria release energy in the absence of oxygen

    ii) What are obligate anaerobes?

  • are completely independent of oxygen

    iii) What are facultative anaerobes?

  • can survive both in the presence and absence of oxygen also called partial anaerobes

    iv) State the Word equation representing anaerobic respiration in plants

  • Glucose ethanol + carbon (iv) oxide + energy

    v) Name the end products of anaerobic respiration in plants

  • alcohol/ethanol

  • carbon iv oxide

  • energy

    g) i) Give a word equation of anaerobic respiration in animals

    Glucose —> lactic acid + energy

    ii) Name the end products of respiration in animals when there is insufficient oxygen supply

  • lactic acid

  • energy

    iii) Why is there a high rate of lactic acid production during exercise?

  • the demand for oxygen is more than supply leading to anaerobic respiration

    iv) Why does lactic acid level reduce after exercise?

  • lactic acid is oxidized to form carbon iv oxide and water

  • some is converted to glucose

  • some is converted into glycogen

    v) State why accumulation of lactic acid during vigorous exercise lead to an increase in heartbeat

  • lactic acid is poisonous to tissues and must be removed

  • to increase supply of oxygen to tissues

    State the economic importance of anaerobic respiration

  • brewing of alcohol

  • biogas production

  • compost manure formation

  • silage formation

  • baking bread

  • production of dairy products

  • fermentation of milk

  • sewage treatment

  • Fermentation of tea in industries.

    What is oxygen debt?

  • amount of oxygen required to convert accumulated lactic acid to water, carbon IV oxide and energy

    h) i) What is respiratory quotient(RQ)?

  • ration of carbon IV oxide produced to oxygen consumed

    RQ = volume of CO2 produced

    volume of oxygen consumed

    ii) Why are respiratory quotient important

  • their calculation assists in identifying the kind of substrate being used in respiration

    iii) Name the respiratory substrates

  • carbohydrates

  • fats

  • proteins

    iv) Why does anaerobic respiration of a given substrate yield a smaller amount of energy than aerobic respiration?

  • Some energy locked up in intermediate products like ethanol in plants and lactic acid in animals

  • substrate is completely oxidized in aerobic respiration

    iv) Explain the disadvantages of anaerobic respiration

  • Less energy produced in anaerobic respiration since food is partially oxidized while in
  • aerobic respiration food is completely oxidized.

  • Some metabolic wastes accumulate in cells affecting cellular functions

  • Ethanol produced in plants poisons the tissues while lactic acid produced in animals

  • causes muscle fatigue/muscle cramp and may stop muscle contraction

  • Such intermediate wastes are not produced in aerobic respiration

    v) Mention the types of experiments carried out for respiration

  • germinating seeds which yield energy in form of heat

  • animals produced heat when they respire

  • yeast cells respire to produce heat

    5. a) i) Define the following terms

    Excretion

  • the process by which organisms get rid of waste products which result from chemical process which occur in living cells

    Secretion

  • the process by which organisms produce substances which are useful to the body, by glands

    Egestion

  • removal of indigestive materials from the body

    Homeostasis

  • maintenance of constant internal environment

    ii) Explain Why excretion is necessary in plants and animals

    -products of excretion are usually harmful while some are toxic

    - if allowed to accumulate in the cells they would destroy tissues and interfere with normal metabolism

    - They are therefore removed through excretion

    b) i) Describe how excretion takes place in green plants

  • carbon IV oxide, oxygen and water diffuse through the stomata, lenticels and hydathodes

  • some toxic wastes are convened into non-toxic substances

  • these are deposited in certain tissues of the plant or stored in aging stmctures

  • resins and tannins are exuded through the bark of stem or lost during leaf fall

    ii) Why do plants lack complex excretory structures like those of animals?

  • plants have lower rates of metabolism

  • plants excrete non-poisonous products derived from carbohydrate metabolism unlike animals which produce toxic wastes derived from protein metabolism

  • plants re-use some of their wastes like nitrogenous wastes used in protein synthesis

  • plants store waste products in roots, fruits and leaves

    ii) State the excretory products of plants and some of their uses to humans

  • caffeine from tea and coffee is used in medicine and as a stimulant which is harmful to humans

  • quinine used for treating malaria

  • cocaine derived from leaves of cocoa plant used as a stimulant by addicts or as a local anesthesia, also causes damage to the brain, may cause addiction if not well used and is an illegal drug

  • Tannins derived from barks of acacia (wattle bark) trees are used to make ink and tanning (softening) of leather.

  • Nicotine got from leaves of tobacco plant stimulates the central nervous, may cause addiction if much is used or consumed. It is used to make cigarettes, cigars and is poisonous. It is a precursor of lung cancer

  • Cannabis sative(bhang) is used to make drugs

  • Gum derived from glues is used for sticking substances and making certain jellies

  • Rubber, a product of latex, got from rubber plant is sued to make tyres and synthetic fibres

  • Morphine from opium poppy plant is a narcotic and illegal drug as it causes addiction

  • Khat and miraa are used as stimulants

  • Colchicines used in inducing polyploidy, cancer therapy, treatment of gouts in small quantities

  • Papain used as meat tenderizer

    c) i) Describe excretion in unicellular organisms

    -examples are amoeba and paramecium

    -They have to remove waste products such as carbon IV oxide and nitrogenous substances e. g urea and ammonia

    - These diffuse from the body surface into the surrounding Water

    - Diffusion is due to large surface area

    ii) List excretory organs and products of mammals

  • kidney excretes urea, water and salts

  • skin excretes Water, slats and urea

  • lungs excrete carbon IV oxide and water

  • liver excretes bile salts

    d)i) Draw and label a mammalian skin

    ii) Explain how the mammalian skin is adapted to its functions

    the skin is made up of dermis and epidermis

    Epidermis

  • it is made up of three layers

  • the outermost layer, comified layer is made up of dead cells that prevent entry of microorganisms, prevent physical damage and dessication

  • granular layer made of living cells gives rise to cornified layer

  • malpighian layer is made up of actively dividing cells that give rise to new epidermal cells/granular layer it contains melanin that protects the body against ultra violet rays(radiations)

    Dermis

  • has several components

  • Has sweat gland which produce sweat through sweat pores on the skin and the sweat evaporates cooling the body by lowering body temperature. When it is cold, no sweat is produced, conserving water

  • sweat contains water, sodium chloride, uric acid and urea hence the skin acts as an excretory organ

  • Has hair. The hair stands erect to trap air when temperature is low to reduce loss/insulation. It lies flat to allow heat loss when temperature is high.

  • Has nerve endings which are sensitive to stimuli such as heat, cold, pain, pressure and touch

  • Has subcutaneous fat/adipose fat that insulates the body against heat loss

  • Has arteries and capillaries (blood vessels) that supply food and oxygen and remove excretory products. Arterioles vasodilate when temperatures are high to lose heat by radiation, and convention. Arterioles constrict when temperatures are low to conserve heat i.e. reduce heat loss

  • Has sebaceous glands which secrete sebum, and antiseptic and water repellant that prevents drying and cracking the skin by making the skin supple

    e) What is the role of lungs in excretion?

  • during respiration oxygen is used up in the body cells to produce energy

  • carbon IV oxide is produced as a by-product

  • the carbon IV oxide must be eliminated from the body

  • elimination is through the lungs

  • also, water vapour is formed and must be removed

  • this removal is through the lungs

  • the lung is therefore considered as an excretory organ as it removes carbon IV oxide and water vapour which are by-products of respiration

    f) State the functions of the liver

    i. Excretion

  • in this function the liver is aided by the kidney

  • deamination i.e. excess amino acids converted into urea and uric acid which is transported to skin and kidney for removal

  • detoxification where harmful substances are converted into harmless ones in the liver and transported to kidneys for removal

  • breakdown of worn out blood cells and haemoglobin and the residue excreted through the
  • kidney to give urine a yellow tinge

  • Breakdown of sex hormones after they have performed their function and the wasted are
  • released through the kidney and bile.

    ii) Homeostasis

  • regulation of blood glucose

  • the normal amount of glucose in blood is about 90mg/ 100

  • increase in blood sugar is detected by cells of the pancreas which secrete insulin

  • insulin stimulates the liver to convert excess glucose to glycogen

  • further excess glucose is converted to fats until the normal blood sugar level is attained

  • Excess glucose is oxidized to carbon IV oxide, water and energy. Excess glucose is also used in respiration

  • decrease in blood sugar level below normal level is detected by the pancreas, which secretes glucagon which stimulates the liver to convert glycogen to glucose until the normal sugar level is attained

  • fats, amino acids are converted to glucose

  • it also leads to reduced oxidation of glucose

    Deamination

  • excess amino acids are deaminated by the removal of amino group

  • the amino group is converted to ammonia

  • ammonia combines with carbon IV oxide to form urea

  • urea is excreted in urine through the kidney

  • Detoxification

  • poisonous substances are converted to less harmful compounds

  • Thermal regulation

  • maintenance of body temperature

  • heat is generated in the liver by chemical activities

  • the heat is distributed

    g) i) Draw a labeled diagram of mammalian nephrone

    ii) Describe how the human kidney functions

  • the afferent arterioles, which is a branch of the renal artery, supplies blood to the glomerulus

  • the afferent arteriole has a wider diameter than the efferent arteriole

  • this difference in diameter of afferent and efferent vessels causes high pressure leading to ultra filtration

  • the walls of the blood capillaries are one cell thick hence glucose, amino acids, vitamins,

  • hormones, salts, cratinine, urea and water filter into Bowman’s capsule to form glomerular filtrate

  • white blood cells, red blood cells, plasma proteins (such as globulin) and platelets are too large to pass through the capillary walls hence remain in blood capillary

  • the filtrate flows into proximal convoluted tubule where amino acids, vitamins and all glucose are selectively reabsorbed back into the blood stream

  • many mitochondria provide energy for reabsorption of these substances against a concentration gradient by active transport

  • the glomerular filtrate flows into the loop of Henle

  • water in the descending loop moves by osmosis into the blood capillaries

  • sodium chloride is actively pumped from the ascending arm of the loop of Henle into the blood capillaries

  • the glomerular filatrate flows into the distal convoluted tubule

  • water and salts are reabsorbed from distal convoluted tubule into blood capillaries

  • the glomerular filtrate flows into collecting tubule (duct) from where more Water is reabsorbed into blood stream

  • antiduretic hormone influences the amount of Water reabsorbed depending on osmotic pressure of blood

  • the glomerular filtrate from collecting duct, now referred to as urine, is emptied into pelvis and ureter into bladder and out of body through urethra

  • urine consists of excess water, slats and nitrogenous wastes

    iii) State the adaptations of proximal convoluted tubule to its function

  • folded to increase surface area for absorption thin epithelium to reduce distance of diffusion micro-villi on inner

  • lining to increase surface area for absorption folded to reduce speed of flow for efficient absorption numerous mitochondira to provide energy for reabsorption dense capillary network to transport reabsorbed products

    iv) Name the common kidney diseases

  • nephritis

  • kidney stones(renal calculi

  • cystitis

  • oedema

  • kidney failure

    6. a) i) Why is homeostatic control necessary?

  • this provides a constant internal environment so that the cells of the body have the optimum (best) condition for their survival

    ii) What is internal environment?

  • immediate surrounding of body cells

  • refers to tissue fluid within an organism

    b) i) Why is constant body temperature maintained by mammals?

  • most enzymes in the body function within a narrow range of temperature

  • high temperature denatures enzymes

  • low temperature inactivates and inhibits enzymes

    ii) Explain the advantage gained by possessing a constant body temperature

  • animals remain active despite fluctuations in environmental temperature

  • higher chances of survival in various environments ie they colonize various environments

  • chemical processes in their body continues at an optimum rate

    iii) How do mammals regulate body temperature?

  • the body temperature of a mammal is kept constant

  • to maintain this temperature the mammal must be able to balance its heat loss against the heat gain

  • body temperature is controlled by the hypothalamus, a specialized part of the brain

  • changes in the temperature within the body and the surrounding are detected by the hypothalamus it transmits impulses to the skin and the blood stream in response to temperature changes hypothalamus acts as a thermostat for the body

  • a mammal loses heat by breathing out, urine, feaces, skin by radiation and by evaporation of sweat.

  • A mammal generates heat by the activity of its muscles, by general metabolism in respiration, or chemical activities

  • In hot conditions the hypothalamus stimulates responses that increase heat loss from the body hence lowering the body temperature

  • Such responses include sweating, vasodilation, keeping its hair flat on the surface of skin and reduction of metabolic rate

  • In cold conditions the hypothalamus stimulates responses that generate heat gain in the body and reduce heat loss to the environment

  • Such responses include shivering, vasoconstriction, raising its hair to trap a layer of air around the skin because still air is a good insulator of heat and by generation of heat by increasing metabolic rate.

    iv) Why does body temperature of a healthy person rise up to 37 C on a hot humid day?

  • sweat evaporation is reduced hence cooling is less therefore more heat is retained in the body causing temperature to rise

    v) Name the structures in the human body that detect external temperature changes

  • temperature receptors (end bulb corpuscles e. g. bulb of Krause (warmth) and organ of Ruffinni (cold)

  • heat (thermal) receptors

    vi) State the advantages that organisms with small surface area to volume ratio experience over those with larger

  • heat loss slow hence their body temperature can increase to intolerable levels

  • Heat gain from surrounding slower hence may remain inactive for a long time.

  • Need specialized and complex transport system and also gaseous exchange system

    Explain why individuals with smaller sizes require more energy per unit body weight than those with larger sizes.

  • surface area to volume ratio is higher in smaller individuals than larger ones, therefore smaller heat is lost faster by smaller ones than larger ones

  • they therefore require more energy per unit body weight to maintain body temperature

    c) i) What is the meaning of osmoregulation?

  • mechanism which regulates osmotic pressure of internal environment of an organism

  • the regulation/maintenance of salt/solute-water balance of an internal environment

    ii) State the importance of osmoregulation

  • Maintenance of constant level of water and slats (osmotic pressure) for optimum/suitable conditions for metabolism suitable for cellular functions

    iii) State the ways by which desert mammals conserve water fewer glomeruli longer loop of Henle

  • excretion of dry feaces or concentrated urine

  • hump for fat to be metabolized to give metabolic water for use

  • nocturnal, burrowing, aestivate or hibernate

  • sweat glands few or absent

  • more ADH (vasopressin)

    iv) Explain why some desert animals excrete uric acid rather than Water

  • uric acid is less toxic than ammonia, hence elimination of uric acid requires less water

  • than ammonia therefore more water conserved

  • uric acid being less toxic is safer to excrete where there is less water/desert

    v) Explain why eating a meal with too much salt leads to production of a small volume of concentrated urine

  • the concentration of salts in the blood rises leading to production of more ADH hence higher rate of water reabsorption by kidney tubules

    vi) Explain how marine fish regulate their osmotic pressure

  • swallow plenty of sea water to increase amount of water in the body

  • have chloride excretory cells in their gills to remove excess salts

  • eliminate nitrogenous wastes in form of trimethalamine oxide which requires little water for elimination

  • few/small glomeruli thus slow filtration rate in the kidneys

  • retain nitrogenous wastes in form of urea to raise osmotic pressure of body fluids

    d) i) What is the biological significance of maintaining a relatively constant sugar level in a human body?

  • body cells are surrounded by tissue fluids that are isotonic/same osmotic pressure as cytoplasm

  • if sugar level is high/hypertonic, cell will lose water by osmosis to the surrounding, thus increasing the concentration of the contents

  • this changes the physiology of the cell

  • if the blood sugar is lower than the normal, the cytoplasm gains water by osmosis,

  • diluting the cell contents, thus altering the physiology of the cell

    ii) Discuss the role of the following hormones in blood sugar control

    Insulin

  • insulin is produced when there is increase in blood sugar concentration

  • it converts glucose to glycogen which is in the liver or muscle thus lowering sugar level

    Glucagon

  • when glucose level decreases glucagon is produced, which causes the breakdown of glycogen to glucose thus raising blood sugar level

    e) Explain the part played by antidiuretic hormone in homeostasis

  • Produced when there is less water (high osmotic pressure above normal level of salt concentration) in the blood.

  • It acts on kidney tubules (nephron) thus increasing water reabsorption from tubules to the blood stream, thus restoring osmotic pressure

  • When there is more water(lower osmotic pressure) or decreased salt concentration in blood, little or no ADH is produced, less water reabsorbed hence water loss in urine (more dilute urine) hence raising the osmotic pressure in body fluids/blood

    f) What is the role of blood clotting in homeostasis?

  • when a blood vessel is cut, there is exposure of blood platelets to the air

  • this triggers fibrinogen to be converted to fibrin

  • the fibrin forms a clot that prevents body fluids e. g. blood from being lost

  • therefore the clot conserves water and salts in the body

    g) Describe the role of the following hormones in homeostasis

    i. Aldosterone

  • concerned with regulation of ionic balance

  • secreted by the cortex of adrenal glands

  • it increases sodium ion uptake by the gut and promotes the reabsorption of sodium ions (and therefore water) in the kidneys)

  • this is accompanied by elimination of potassium ions

  • this raises the overall level of sodium and lowers the overall level of potassium in the blood

  • as sodium ions are absorbed in the blood, chlorine ions follow so as to neutralize the effect of sodium ions

  • the production of aldosterone is regulated by the concentration of sodium ions which has an inhibiting effect, and a fall in sodium ions has a stimulating effect on the adrenal cortex

  • the flow of aldosterone is stimulated by the adreno-cortic-tropic hormone (ACTH) produced in the anterior of the pituitary gland however, the main method of control is dependent on the fact that adrenal cortex itself is somehow sensitive to the relative concentration of potassium and sodium in the blood

    ii. Adrenaline

  • produced by adrenal glands

  • in high concentrations, it increases hydrolysis of glycogen and increases blood sugar

  • it is usually released in emergency cases to increase glucose level for respiration

  • this releases energy for the emergency

    h) i) Distinguish between diabetes mellitus and diabetes insipidus

  • diabetes mellitus is a condition resulting from insufficient production of insulin causing hyperglucaemia and presence of glucose in urine

  • diabetes insipidus is a condition whereby less or no antidiuretic hormone is secreted hence a high volume of water is passed out in urine in a condition called diuresis

    ii) How can high blood sugar level in a person be controlled?

  • administer insulin

    iii) Why does glucose not normally appear in urine even though it is filtered in the mammalian Bowman’s capsule?

  • glucose molecules are actively reabsorbed in the proximal convoluted tubules

    iv) When is glycogen which is stored in the liver converted into glucose and released into the blood?

  • after activity/when blood sugar (glucose) falls below normal

  • when glucagon

  • stimulates the liver/when glucagon is produced

  • after strenuous/vigorous activity

  • during starvation

    v) How would one find out from a sample of urine whether a person is suffering from diabetes mellitus?

  • test or react urine in Benedict’s solution

  • positive result i.e. orange or red precipitate

  • Positive result is an indication of diabetes mellitus

  • Biology Diagrams and Images
  • Biology Notes Form 1
  • Biology Notes Form 2
  • Biology Notes Form 3
  • Biology Notes Form 4
  • Biology Questions and Answers Form One
  • Biology Questions and Answers Form Two
  • Biology Questions and Answers Form Three
  • Biology Questions and Answers Form Four
  • KCSE Revision Notes Form 1 - Form 4 - All Subjects

    Biology Notes FAQ Form

    Please insert your question in the form below. Check and ensure that your question has not been asked and answered in the enquiries appearing beneath the form.

    [ ? ]

    Author Information (optional)

    To receive credit as the author, enter your information below.

    (first or full name)

    (e.g., City, State, Country)

    Submit Your Contribution

    •  submission guidelines.


    (You can preview and edit on the next page)

    Biology Notes Questions and Answers

    Click below to see contributions from other visitors to this page...

    Describe how an amino acid forms a polypeptide. Not rated yet
    Describe how an amino acid forms a polypeptide. Q: Describe the structure of an amino acid and the formation of a peptide bond. A. Proteins are made …

    Click here to write your own.

    KCSE Revision Notes Form 1 - Form 4 All Subjects

  • Agriculture Form 1 Notes
  • Agriculture Form 2 Notes
  • Agriculture Form 3 Notes
  • Agriculture Form 4 Notes
  • Agriculture Notes Primary Tillage
  • Betrayal in the City by Francis Imbuga
  • Biology Diagrams and Images
  • Biology Notes Form 1
  • Biology Notes Form 2
  • Biology Notes Form 3
  • Biology Notes Form 4
  • Biology Questions and Answers Form One
  • Biology Questions and Answers Form Two
  • Biology Questions and Answers Form Three
  • Biology Questions and Answers Form Four
  • Business Studies Notes KCSE Form 1 - 4 | Business Notes for Secondary Schools in Kenya
  • Chemistry Notes - Acid, Bases and Indicators
  • Chemistry Notes - Acid, Bases and Salts
  • Chemistry Notes Form 1
  • Chemistry Notes Form 2
  • Chemistry Notes Form 3
  • Computer Studies Notes Form 1
  • Computer Studies Notes Form 2
  • Computer Studies Notes Form 3
  • Computer Studies Notes Form 4
  • CRE Notes - Christian Religious Education Revision
  • CRE Notes - Christian Religious Education Questions and Answers
  • CRE Notes Form 1
  • CRE Notes Form 2
  • CRE Notes Form 3
  • CRE Notes Form 4
  • CRE Notes Form 1 - 4
  • English Grammar Notes
  • English Moral Stories and Composition Ideas
  • History and Government Notes Form 1 to Form 4
  • History and Government Questions and Answers
  • Home Science Form 1 Notes
  • Home Science Form 2 Notes
  • Home Science Form 3 Notes
  • Home Science Form 4 Notes
  • How to Revise Efficiently for KCSE Exams
  • Geography Notes Form 1
  • Geography Notes Form 2
  • Geography Notes Form 3
  • Geography Notes Form 4
  • Physics Notes Form 1
  • Physics Notes Form 2
  • Physics Notes Form 3
  • Physics Notes Form 4
  • Physics Notes Form 1 to 4
  • The River and the Source
  • More Biology Notes - Biology Study Guide

    KCSE Results » KCSE Results Top 100 Schools - Kenya Certificate of Secondary Education – KCSE » KCSE Top 100 Candidates » Kenya Certificate of Secondary Education – KCSE » KNEC - Kenya National Examinations Council » Secondary Schools in Kenya » KNEC - Kenya National Examinations Council » Free KNEC KCSE Past Papers

    Kenya Scholarships for Undergraduate Students » Kenya Scholarships for Postgraduate Students » Undergraduate Scholarships for Kenyan Students » Kenya Undergraduate Scholarships » Full Undergraduate Scholarships for Kenyans » Kenya Postgraduate Scholarships » Scholarships & Grants » Undergraduate Scholarships » Universities in Kenya » Kenya Universities and Colleges Central Placement Service (KUCCPS) » Colleges in Kenya » KASNEB Registration & Results » Secondary Schools Scholarships in Kenya » Undergraduate & Graduate Scholarships for Kenyans

    Scholarships for African Students » Undergraduate Scholarships » African Women Scholarships & Grants » Developing Countries Scholarships » Erasmus Mundus Scholarships for Developing Countries » Fellowship Programs » Funding Grants for NGOs » Government Scholarships » LLM Scholarships » MBA Scholarships » PhD and Masters by Research Scholarships » Public Health Scholarships - MPH Scholarships » Refugees Scholarships » Research Grants » Scholarships and Grants

    Scholarships in Australia » Scholarships in Belgium » Scholarships in Canada » Scholarships in Germany » Scholarships in Italy » Scholarships in Japan » Scholarships in Korea » Scholarships in Netherlands » Scholarships in UK » Scholarships in USA

    aa Biology Questions and Answers 10th Grade Biology Questions and Answers 10th Grade Biology Test 11th Ncert Biology 12th Class Biology Book Free Download 2017 Biology Hsc Answers 9th Grade Biology Study Guide A Level Biology Biological Molecules Questions A Level Biology Exam Questions by Topic A Level Biology Notes Edexcel A Level Biology Notes Xtremepapers A Level Biology Questions and Answers A Level Biology Questions and Answers (Pdf) A Level Biology Questions and Answers Pdf A Level Biology Questions by Topic - Kidney Questions With Markschemes A Level Biology Revision A Level Biology Revision Edexcel A Level Biology Revision Guide A Level Biology Revision Notes A Level Biology Revision Notes Pdf A Level Biology Textbook Pdf A Level Biology Year 1 / as Aqa Exam Questions by Topic A Level Edexcel Notes - a* Biology Aerobic Respiration in Plants All Biology Essays All Biology Essays Form 1 All Biology Essays Form 2 All Biology Essays Form 3 All Biology Essays Form 4 Anaerobic Respiration Equation Animal Cell Organelles Quiz Answers Animal Cell Questions and Answers Animal Cell Quiz Animal Cell Quiz Labeling Ap Bio Quizzes Ap Biology Essay Questions and Answers As Level Biology Notes Bbc Bitesize Biology Ks3 Biology 101 Biology 12th Biology 12th Class Notes Pdf Biology 2019 Syllabus Biology Book 3 Klb Biology Book 3 Notes Biology Book for Class 11 Biology Book Pdf Free Download Biology Cell Structure Test Biology Class 12 Ncert Solutions Biology Class 12 Pdf Biology Communication Syllabus Biology Diagrams for Class 12 - Biology Diagram Software - Biology Diagrams for Class-10 - Biology Diagrams for Class 11 - Biology Diagrams for Class 9 - Biology Diagrams to Label - Biology Diagram of Female Reproductive System - Biology Diagrams Pdf - Biology Diagrams in Form 1 - Biology Diagrams in Form 2 - Biology Diagrams in Form 3 - Biology Diagrams in Form 4 - Kcse Biology Diagrams -biology Revision Tips Biology Essay Questions and Answers Biology Essay Questions and Answers 2018 Biology Essay Questions and Answers Form 1 Biology Essay Questions and Answers Form 2 Biology Essay Questions and Answers Form 3 Biology Essay Questions and Answers Form 4 Biology Essay Questions and Answers Form 4 Pdf Biology Essay Questions and Answers Pdf Biology Essay Questions and Answers Pdf Form 1 Biology Essay Questions and Answers Pdf Form 2 Biology Essay Questions and Answers Pdf Form 3 Biology Essay Questions and Answers Pdf Form 4 Biology Essays and Answers Biology Essays and Answers Form 1 Biology Essays and Answers Form 2 Biology Essays and Answers Form 3 Biology Essays and Answers Form 4 Biology Essays Kcse Biology Essays Kcse Form 1 Biology Essays Kcse Form 2 Biology Essays Kcse Form 3 Biology Essays Kcse Form 4 Biology Essays Pdf Biology Exam 2 Test Biology Exam Form Four Biology Exam Form One Biology Exam Form Three Biology Exam Form Two Biology Exam Practice Test Biology Exam Questions and Answers Biology Exam Questions and Answers Pdf Biology Exam Study Guide Biology Excretion Notes Biology Exercise Form 4 With Answers Biology Final Exam Answer Key Biology Final Exam Answer Key 2016 Biology Final Exam Answer Key 2017 Biology Final Exam Answers 2018 Biology Final Exam Answers 2019 Biology Final Exam Questions and Answers Biology Form 1 & 2 and Answers Biology Form 1 Chapter 1 Biology Form 1 Diagrams Biology Form 1 Notes Biology Form 1 Notes Pdf Biology Form 1 Past Papers Biology Form 1 Questions Biology Form 1 Questions and Answers Biology Form 1 Questions and Answers Pdf Biology Form 1 Questions and Answers Pdf Form 1 Biology Form 1 Revision Questions Biology Form 1 Syllabus Biology Form 2 Chapter 1 Biology Form 2 Chapter 2 Biology Form 2 Diagrams Biology Form 2 Notes Biology Form 2 Notes Pdf Biology Form 2 Past Papers Biology Form 2 Pdf Biology Form 2 Questions Biology Form 2 Questions and Answers Biology Form 2 Questions and Answers Pdf Biology Form 2 Questions and Answers Pdf Form 2 Biology Form 2 Revision Notes Biology Form 2 Syllabus Biology Form 3 Chapter 3 Biology Form 3 Classification Biology Form 3 Diagrams Biology Form 3 Ecology Biology Form 3 Notes Biology Form 3 Notes Pdf Biology Form 3 Past Papers Biology Form 3 Questions Biology Form 3 Questions and Answers Biology Form 3 Questions and Answers Pdf Biology Form 3 Questions and Answers Pdf Form 3 Biology Form 3 Questions and Answers Term 3 Biology Form 3 Questions and Answers+pdf Biology Form 3 Revision Notes Biology Form 3 Syllabus Biology Form 3 Topics Biology Form 4 All Chapter Biology Form 4 Chapter 4 Biology Form 4 Diagrams Biology Form 4 Notes Biology Form 4 Notes All Chapter Pdf Biology Form 4 Notes Chapter 1 Biology Form 4 Notes Pdf Biology Form 4 Past Papers Biology Form 4 Questions Biology Form 4 Questions and Answers Biology Form 4 Questions and Answers Pdf Biology Form 4 Questions and Answers Pdf Form 4 Biology Form 4 Syllabus Biology Form 4 Textbook Pdf Biology Form Four Notes Pdf Biology Form Four Questions and Answers Biology Form Four Questions and Answers Pdf Biology Form One Biology Form One Exam Biology Form One Notes Pdf Biology Form One Questions Biology Form One Questions and Answers Biology Form One Questions and Answers Pdf Biology Form One Term Three Test Biology Form Three Questions and Answers Biology Form Three Questions and Answers Pdf Biology Form Three Reproduction Biology Form Three Reproduction. Biology Form Three-questions and Answers Biology Form Two Diagrams Biology Form Two Notes Pdf Biology Form Two Questions and Answers Biology Form Two Questions and Answers Pdf Biology Form2 Biology Form2 Textbook Biology Grade 10 Exam Papers Biology Hsc Pdf Biology Human Reproduction Video Biology Kcse 2017 Biology Kcse 2017 Paper 1 Biology Kcse Questions Biology Made Familiar Biology Mcq for Class 11 Biology Mcq for Class 12 Biology Mcq for Competitive Exams Biology Mcq for Competitive Exams Pdf Biology Mcq for Neet Pdf Biology Mcq With Answers Pdf Biology Mcqs for Class 12 Pdf Biology Mid Familia Form One Biology Multiple Choice Questions and Answers Cxc Biology Multiple Choice Questions and Answers Pdf Biology Multiple Choice Questions With Answers Pdf Biology Notes Biology Notes for High School Students Biology Notes for Igcse 2014 Biology Notes Form 1 Biology Notes Form 1 Pdf Biology Notes Form 2 Biology Notes Form 2 Pdf Biology Notes Form 3 Biology Notes Form 3 Pdf Biology Notes Form 4 Biology Notes Form 4 Chapter 2 Biology Notes Form 4 Pdf Biology Notes Form One Pdf Biology Notes Form Three Biology Notes Form Two Biology Objective Answer Biology Objective Questions for Competitive Exams Pdf Biology Paper 1 Biology Paper 1 Notes Biology Paper 1 Questions Biology Paper 1 Questions and Answers Biology Paper 1 Questions and Answers Form 1 Biology Paper 1 Topics Biology Paper 2 2017 Biology Paper 2 Questions and Answers Biology Paper 2 Questions and Answers Form 2 Biology Paper 2 Revision Biology Paper 2018 Biology Paper 3 Questions and Answers Form 3 Biology Paper 4 Questions and Answers Form 4 Biology Paper One Questions and Answers Biology Past Papers 2017 Biology Past Papers Form 3 Biology Practical Book Class 12 Pdf Biology Practical Exam Biology Practicals Questions and Answers Biology Practice Test 9th Grade Biology Practice Test Answers Biology Practice Test Questions and Answers Biology Question and Answers Note Biology Questions Biology Questions and Answers Biology Questions and Answers for High Schools Biology Questions and Answers for High Schools Pdf Biology Questions and Answers for High Schools Pdf Form 1 Biology Questions and Answers for High Schools Pdf Form 2 Biology Questions and Answers for High Schools Pdf Form 3 Biology Questions and Answers for High Schools Pdf Form 4 Biology Questions and Answers Form 1 Biology Questions and Answers Form 2 Biology Questions and Answers Form 3 Biology Questions and Answers Form 4 Biology Questions and Answers Multiple Choice Biology Questions and Answers on Cells Biology Questions and Answers Online Biology Questions and Answers Pdf Biology Questions for High School Biology Questions for High School Students With Answers Biology Questions Multiple Choice Biology Questions Quizlet Biology Questions to Ask Your Teacher Biology Quiz for Class 9 Biology Quiz Questions and Answers for Class 10 Biology Quiz Questions and Answers for Class 12 Biology Quiz Questions and Answers for Class 9 Biology Quiz Questions and Answers for High School Biology Quiz Questions and Answers Pdf Biology Quiz Questions for Class 12 Biology Quiz Questions for College Students Biology Quiz With Answers Biology Quiz With Answers Pdf Biology Revision Biology Revision a Level Biology Revision Notes Form 1 Biology Revision Notes Form 2 Biology Revision Notes Form 3 Biology Revision Notes Form 4 Biology Revision Notes Igcse Biology Revision Questions Biology Study Guide Biology Study Guide - Biology Questions and Answers Biology Study Guide Answer Key Biology Study Guide Answers Biology Study Guide Ib Biology Study Guide Pdf Biology Study Notes Biology Syllabus in Kenya Biology Test Questions and Answers Biology Test Questions and Answers Pdf Biology Topics Form One Biology Unit 1 Quiz Biology | Revision Science Cell Biology Exam Questions and Answers Cell Biology Exam Questions Pdf Cell Biology Mcq With Answers Cell Biology Multiple Choice Questions and Answers Pdf Cell Biology Multiple Choice Questions Pdf Cell Biology Previous Question Papers Cell Biology Question Bank Cell Biology Question Bank Pdf Cell Biology Question Paper Pdf Cell Biology Questions and Answers Multiple Choice Cell Biology Questions and Answers Multiple Choice Pdf Cell Biology Questions and Answers Pdf Cell Biology Questions and Answers Pdf in Hindi Cell Biology Short Answer Questions Cell Biology Test Bank Questions Cell Biology Test Questions and Answers Cell Biology Test Questions and Answers Pdf Cell Mcq Pdf Cell Organelles Labeling Quiz Cell Organelles Multiple Choice Questions and Answers Cell Questions and Answers Cell Questions and Answers Pdf Cell Questions Quizlet Cell Structure and Function Pdf Cell Structure and Function Pdf Class 11 Cell Structure and Function Quiz Answers Cell Structure and Function Test Answer Key Cell Structure and Function Test Pdf Cells Cells Questions Cellular Organization Pdf Chemical Equation for Aerobic Respiration Chemistry Form 1 Questions and Answers Chemistry Form 2 Exams Chemistry Form 2 Questions and Answers Chemistry Form 2 Questions and Answers Pdf Chemistry Form 3 Questions and Answers Chemistry Form 3 Revision Questions Chemistry Form 4 Questions and Answers Chemistry Form One Questions and Answers Pdf Chemistry Kcse Questions and Answer Chemistry Paper 2 Questions and Answers Chemistry Paper 3 Question and Answer Cie a Level Biology Notes 2016 Cie a Level Biology Notes Pdf Class 10 Biology Chapter 1 Mcqs College Biology Practice Test College Biology Quiz College Biology Quiz Chapter 1 College Biology Quizlet College Biology Study Guide College Biology Study Guide Pdf College Biology Test Questions and Answers Complete Biology for Cambridge Igcse Revision Guide Pdf Cytology Mcqs With Answers Pdf Difficult Questions on Gaseous Exchange in Animals Download Form Three Biology Notes Download Klb Biology Book 2 Easy Biology Questions Easy Cell Questions Edexcel a Level Biology B Edexcel a Level Biology Notes Pdf Edexcel a Level Biology Salters Nuffield Edexcel A2 Biology Notes Edexcel as Biology Revision Guide Pdf Edexcel Biology A2 Revision Notes Pdf Edexcel Biology Unit 2 Revision Notes Edexcel Gcse Science Revision Guide Pdf Energy Questions Science Bowl Essential Cell Biology Test Bank Answers Essential Cell Biology Test Bank Download Free Exam Notes for Biology 101 Excretion Question and Answer Form 4 Work Excretion Questions and Answers Excretory System Questions and Answers Pdf Excretory System Structure F3 Biology Test Paper Form 1 Biology Exam Form 1 Biology Notes Form 1 Biology Questions and Answers Form 1 Biology Syllabus Form 1 Mathematics Questions and Answers Form 1 Mathematics Test Paper Pdf Form 1 Revision Papers Form 2 Biology Exam Form 2 Biology Notes Pdf Form 2 Biology Questions and Answers Form 2 Biology Questions and Answers > Form 2 Biology Syllabus Form 2 Mathematics Questions and Answers Form 3 Biology Book Form 3 Biology Exam Form 3 Biology Questions and Answers Form 3 Chemistry Exam Paper Form 3 Chemistry Questions and Answers Pdf Form 3 English Exam Paper Form 3 History Exam Paper Form 3 Maths Exam Paper Form 4 Biology Exam Form 4 Biology Questions and Answers Form Four Biology Book Form Four Biology Revision Questions Form Four Biology Syllabus Form Four Biology Topics Form One Biology Book Form One Biology Questions Form One Biology Revision Questions Form One Biology Syllabus Form One Biology Topics Form One Geography Questions and Answers Form One Notes of Biology Form One Past Papers Form Three Biology Book Form Three Biology Notes Form Three Biology Revision Questions Form Three Biology Syllabus Form Three Biology Topics Form Three Cre Notes Pdf Form Two Biology Book Form Two Biology Examination Form Two Biology Notes Form Two Biology Revision Questions Form Two Biology Syllabus Form Two Biology Topics Form Two Chemistry Cat Form Two Chemistry Past Papers Form Two Chemistry Questions and Answers Form Two Chemistry Questions and Answers Pdf Form Two Notes Free a-level Biology Revision App | Pass Your Biology Exams Free Biology Form 1 Notes Free Biology Form 2 Notes Free Biology Form 3 Notes Free Biology Form 4 Notes Free College Biology Practice Test Free Kcse Revision Notes Fun Biology Questions Funny Biology Questions and Answers Funny Biology Quotes Funny Science Questions Funny Science Questions to Ask Gas Exchange Exam Questions Gas Exchange Practice Test Gas Exchange Quiz Gcse Biology Exam Questions and Answers Gcse Biology Past Papers Gcse Biology Revision Gcse Biology Revision Notes Gcse Biology Revision Notes Pdf Gcse Biology Revision Notes Pdf 9-1 Gcse Biology Revision Questions and Answers Gcse Biology Textbook Pdf Gcse Biology Topics - Pass My Exams: Easy Exam Revision Notes General Biology Practice Test With Answers General Biology Quiz General Biology Test Questions and Answers General Knowledge in Biology Human Body General Science Mcq for Ssc General Science Mcqs With Answers Pdf General Science Notes Pdf Geography Form 1 Questions and Answers Pdf Geography Form 1 Revision Questions Geography Form 3 Questions Good Biology Questions to Ask Gre Biology Practice Test Gre Biology Subject Test Pdf Hard Biology Quiz Questions Hard Science Questions and Answers Hard Science Questions to Ask Your Teacher High School Biology Final Exam Doc High School Biology Final Exam Pdf High School Biology Final Exam Questions High School Biology Final Exam Questions and Answers High School Biology Practice Test High School Biology Test Questions and Answers Pdf How Does the Excretory System Work How Many Chromosomes Do Gametes Have How Many Copies of Each Gene Do Gametes Have How Much Genetic Information Is Found in a Gamete How to Study Biology: 5 Study Techniques to Master Biology Hsc Biology 2018 Hsc Biology 2019 Ial Biology Notes Ib Biology Question Bank by Topic Igcse Biology Alternative to Practical Revision Igcse Biology Notes 2017 Pdf Igcse Biology Notes Edexcel Igcse Biology Paper 6 Notes Igcse Biology Revision Guide Igcse Biology Revision Notes Pdf Igcse Biology Revision Worksheets Igcse Biology Znotes Igcse Notes Chemistry Igcse Physics Revision Notes Pdf Interesting Biology Questions Interesting Questions to Ask About Biology Interesting Science Questions and Answers Intro to Biology Quiz K.c.s.e Mathematics Paper 1 2017 Kcse 2015 Biology Paper 3 Kcse 2016 Biology Paper 1 Kcse 2016 Biology Paper 2 Kcse 2017 Biology Paper 2 Kcse 2017 Papers Kcse Biology Essay Questions and Answers Kcse Biology Essay Questions and Answers Pdf Kcse Biology Essays Kcse Biology Essays Pdf Kcse Biology Essays Pdf Form 1 Kcse Biology Essays Pdf Form 2 Kcse Biology Essays Pdf Form 3 Kcse Biology Essays Pdf Form 4 Kcse Biology Notes Kcse Biology Notes Pdf Kcse Biology Paper 1 Kcse Biology Paper 1 2017 Kcse Biology Paper 1 2017 Pdf Kcse Biology Paper 2 Kcse Biology Paper 2 2013 Kcse Biology Paper 2 2015 Kcse Biology Paper 2 2017 Kcse Biology Paper 3 2016 Kcse Biology Paper 3 Past Papers Kcse Biology Past Papers and Answers Kcse Biology Practical Past Papers Kcse Biology Practicals Kcse Biology Questions and Answers Kcse Chemistry Notes Kcse Chemistry Paper 1 2013 Kcse Chemistry Paper 1 2016 Kcse Chemistry Paper 2 2014 Kcse Chemistry Paper 2 2016 Kcse Chemistry Past Papers Kcse Chemistry Past Papers and Answers Kcse Chemistry Practical Kcse Cre Past Papers and Answers Kcse English Paper 3 2016 Kcse Essays Kcse Made Familiar Chemistry Kcse Made Familiar Geography Kcse Made Familiar Kiswahili Kcse Made Familiar Mathematics Pdf Kcse Mathematics Paper 1 2016 Kcse Mathematics Past Papers Pdf Kcse Mock Papers Pdf Kcse Past Papers Kcse Past Papers 2012 Kcse Past Papers 2013 Kcse Past Papers 2014 Pdf Kcse Past Papers 2017 Kcse Past Papers Biology Kcse Past Papers Chemistry Kcse Revision Question Kcse Revision Question for Biology Kcse Syllabus Pdf Kenya Secondary School Chemistry Syllabus Kenya Secondary School Syllabus Pdf Klb Biology Book 2 Klb Biology Book 2 Notes Klb Biology Book 2 Pdf Klb Biology Book 3 Pdf Klb Biology Form 1 Klb Biology Form 1 Notes Klb Biology Form 1 Notes Pdf Klb Biology Form 1 Pdf Klb Biology Form 2 Book Klb Biology Form 2 Notes Klb Biology Form 2 Pdf Klb Biology Form 3 Notes Klb Biology Form 3 Pdf Klb Biology Form 4 Notes Klb Biology Form 4 Pdf Klb Biology Form One Klb Geography Form 3 Knec Biology Syllabus Kusoma Biology Notes Kusoma Biology Notes Pdf Kusoma.com Past Papers Made Familiar Biology Pdf Made Familiar Mathematics Mathematics Form 3 Questions and Answers Mathematics Form 3 Questions and Answers Pdf Mcq on Cell Biology Class 9 Mcqs About Gaseous Exchange Middle School Science Bowl Biology Questions More Than 1800 Biology Questions and Answers to Help You Study Most Tested Questions in Form 1 Biology and Their Answers Most Tested Questions in Form 2 Biology and Their Answers Most Tested Questions in Form 3 Biology and Their Answers Most Tested Questions in Form 4 Biology and Their Answers Most Tested Questions in Form Four Biology and Their Answers Most Tested Questions in Form One Biology and Their Answers Most Tested Questions in Form Three Biology and Their Answers Most Tested Questions in Form Two Biology and Their Answers Multiple Choice Questions on Biology Multiple Choice Questions on Cell Structure and Function O Level Biology Practical Experiments Orm Three Biology Notes Page Navigation Past Paper Questions by Topic Biology Pdf Biology Form 3 Physics Form 1 Questions and Answers Pdf Physics Form One Questions and Answers Physics Questions and Answers Pdf for Competitive Exams Plant and Animal Cell Organelles Quiz Plant and Animal Cell Organelles Quiz Answers Plant and Animal Cell Quiz for 5th Grade Plant and Animal Cell Quiz Grade 8 Plant and Animal Cell Quiz Pdf Plant Cell Plant Cell Pdf Download Plant Cell Questions and Answers Plant Cell Test Questions Practical Biology Experiments Pdf Practical Biology Question and Answer Pdf Preliminary Biology Questions About Cells Biology Questions and Answers on Gaseous Exchange Questions and Answers Pdf Biology Form 1 Questions and Answers Pdf Biology Form 2 Questions and Answers Pdf Biology Form 3 Questions and Answers Pdf Biology Form 4 Questions and Answers Pdf Biology Form Four Questions and Answers Pdf Biology Form One Questions and Answers Pdf Biology Form Three Questions and Answers Pdf Biology Form Two Questions Based to Introduction to Biology Questions on Cell Structure and Function Questions on Gaseous Exchange in Humans Questions to Ask in Biology Class Questions to Confuse Your Science Teacher Respiration and Gas Exchange Worksheet Respiration Notes My Elim Form Two Revision Papers Revision Quiz for Biology for Form Three Science Bowl Biology Study Guide Science Bowl Questions Biology Science Bowl Questions Chemistry Science Bowl Questions Earth Science Science Bowl Questions Math Science Bowl Questions Middle School Science Bowl Questions Physics Science Quiz for Class 9 Biology Science Quiz Questions and Answers for Class 10 Science Quiz Questions and Answers for Class 10 Pdf Science Quiz Questions and Answers for Class 9 Pdf Simple Scientific Questions Smart Questions to Ask a Physics Teacher Smart Questions to Ask a Science Teacher Snab Biology Revision Notes The Animal Cell Quiz Answers The Excretory System Answer Key The Excretory System Worksheet Answers The Plant Cell Quiz Answer Key Tricky Biology Questions and Answers Tricky Science Questions for Adults Tricky Science Quiz Questions Two Biology Revision Questions Types of Respiration What Are Gametes What Are Gametes in Biology What Are Gametes in Plants What Are Gametes in Punnett Squares What Are Gametes Quizlet What Are the Types of Gametes Working of Excretory System Year 11 Biology Znotes as Biology

    Biology Questions and Answers Form 2 - Biology Questions and Answers Form 2 - Biology Questions and Answers Form 2

    "Pdf" Revision Questions Biology Form 2 "Pdf" Revision Questions Biology Form 3 "Pdf" Revision Questions Biology Form 4 "Pdf" Revision Questions Biology Form Four "Pdf" Revision Questions Biology Form One "Pdf" Revision Questions Biology Form Three "Pdf" Revision Questions Biology Form Two 1 a a KCSE Past Papers 10th Grade Biology Questions and Answers 10th Grade Biology Test 11th Ncert Biology 12th Class Biology Book Free Download 2014 KCSE Marking Schemes 2014 Pdf KCSE Past Papers 2015 2015 Biology Essay Questions and Answers Form 4 2016 KCSE Papers 2016 KCSE Prediction Questions 2017 Biology Hsc Answers 2017 KCSE Prediction Questions 2018 Biology KCSE Leakage 2018 Biology KCSE Questions 2018 KCSE Busineness Studies 2018 KCSE Exam 2018 KCSE Leakage 2018 KCSE Prediction Questions 2018 KCSE Questions 2019 Biology KCSE Leakage 2019 Biology KCSE Questions 2019 KCSE Leakage 2019 KCSE Questions 9th Grade Biology Study Guide A a a Biology Notes a a a Biology Notes! a a a BiologyNotes! A a KCSE Past Papers A Biblical View of Social Justice A Level Biology Biological Molecules Questions A Level Biology Exam Questions by Topic A Level Biology Notes Edexcel A Level Biology Notes Xtremepapers A Level Biology Past Papers A Level Biology Questions and Answers a Level Biology Questions and Answers A Level Biology Questions and Answers (Pdf) A Level Biology Questions and Answers Pdf A Level Biology Questions by Topic Kidney Questions With Markschemes A Level Biology Revision A Level Biology Revision Edexcel A Level Biology Revision Guide A Level Biology Revision Notes A Level Biology Revision Notes Pdf A Level Biology Textbook Pdf A Level Biology Year 1 / as Aqa Exam Questions by Topic A Level Edexcel Notes a* Biology aa Biology Form 3 Questions and Answers Advance KCSE Past Papers Advance-africa.com KCSE Rev Quiz Advantages and Disadvantages. Aerobic Respiration in Plants All Biology Essays All Biology Notes for Senior Two All KCSE Past Papers Biology With Making Schemes All Marking Schemes Questions and Answers All Past K.c.s.e Questions With Answers Alliance Mocks 2017 Anaerobic Respiration Equation Animal Cell Organelles Quiz Answers Animal Cell Questions and Answers Animal Cell Quiz Animal Cell Quiz Labeling Ap Bio Quizzes Ap Biology 1 Textbook Pdf Ap Biology Essay Questions and Answers Are Sourced From KNEC. As Level Biology Notes Atika Biology Notes Atika School Biology Notes B/s Book 2 Notes Basic Biology Books Pdf basic Biology Interview Questions and Answers Pdf Basic Biology Interview Questions and Answers Pdf Basic Biology Pdf Basic Biology Questions and Answers Basic Biology Questions and Answers Pdf Bbc Bitesize Biology Ks3 Bihar Board Biology Objective Answer 2017 Bihar Board Biology Objective Answer 2018 Bio Answers Bio Quesions Biology 0478 Biology 101 Biology 12th Biology 12th Class Notes Pdf Biology 2019 Syllabus Biology All KCSE Short Notes Biology Answers Biology Answers Online Free Biology Answers Quizlet Biology Bk 2 Notes Biology Book 1 Biology Book 1 Notes Biology Book 2 Biology Book 2 Notes Biology Book 3 Biology Book 3 KLB Biology Book 3 Notes Biology Book 4 Biology Book 4 Notes Biology Book 4 Pdf Biology Book for Class 11 Biology Book Four Biology Book Four Notes Biology Book One Biology Book One Notes Biology Book Pdf Free Download Biology Book Three Biology Book Three Notes Biology Book Three Pdf Biology Book Two Biology Book Two Notes Biology Books Form Three Biology Bowl Biology Study Guide Biology Bowl Questions Biology Biology Bowl Questions Earth Biology Biology Bowl Questions Math Biology Bowl Questions Middle School Biology Brekthrough Form Two Notes Biology Cell Structure Test Biology Class 12 Ncert Solutions Biology Class 12 Pdf Biology Communication Syllabus Biology Diagram of Female Reproductive System Biology Diagram Software Biology Diagrams for Class 11 Biology Diagrams for Class 12 Biology Diagrams for Class 9 Biology Diagrams for Class-10 Biology Diagrams in Form 1 Biology Diagrams in Form 2 Biology Diagrams in Form 3 Biology Diagrams in Form 4 Biology Diagrams Pdf Biology Diagrams to Label Biology Essay Questions and Answers Biology Essay Questions and Answers 2018 Biology Essay Questions and Answers Form 1 Biology Essay Questions and Answers Form 2 Biology Essay Questions and Answers Form 3 Biology Essay Questions and Answers Form 4 Biology Essay Questions and Answers Form 4 Pdf Biology Essay Questions and Answers Pdf Biology Essay Revision Q Biology Essays and Answers Biology Essays Form One to Form Four Biology Essays Form One to Form Three Biology Essays KCSE Biology Essays Pdf Biology Exam 1 Multiple Choice Biology Exam 2 Advance Biology Exam 2 Test Biology Exam 2016 Biology Exam Form Four Biology Exam Form One Biology Exam Form Three Biology Exam Form Two Biology Exam Practice Test Biology Exam Questions Biology Exam Questions and Answers Biology Exam Questions and Answers Pdf Biology Exam Study Guide Biology Exams Biology Excretion Notes Biology Exercise Form 4 With Answers Biology Final Exam Answer Key Biology Final Exam Answer Key 2016 Biology Final Exam Answer Key 2017 Biology Final Exam Answers 2018 Biology Final Exam Answers 2019 Biology Final Exam Questions and Answers Biology Fom 1 Notes Biology Fom 2 Notes Biology Fom 3 Notes Biology Fom 4 Notes Biology Form 1 Biology Form 1 & 2 and Answers Biology Form 1 and 2 Essays Biology Form 1 and 2 Essays Questions and Answers Biology Form 1 Chapter 1 Biology Form 1 Diagrams Biology Form 1 Exams Biology Form 1 Mid Year Exam Biology Form 1 Notes Biology Form 1 Notes and Questions Biology Form 1 Notes Download Biology Form 1 Notes Free Download Biology Form 1 Notes GCSE Biology Form 1 Notes KCSE-kcse Biology Form 1 Notes Pdf Biology Form 1 Notes Pdf Download Biology Form 1 Past Papers Biology Form 1 Pdf Biology Form 1 Pressure Biology Form 1 Question Papers Biology Form 1 Questions Biology Form 1 Questions and Answers Biology Form 1 Questions and Answers Pdf Biology Form 1 Quiz Biology Form 1 Revision Questions Biology Form 1 Summary Notes Biology Form 1 Syllabus Biology Form 1 Work Biology Form 1-4 Notes Biology Form 2 Biology Form 2 Chapter 1 Biology Form 2 Chapter 2 Biology Form 2 Diagrams Biology Form 2 Exam Paper 2014 Biology Form 2 Exams Biology Form 2 Notes Biology Form 2 Notes and Questions Biology Form 2 Notes GCSE Biology Form 2 Notes KCSE-kcse Biology Form 2 Notes Pdf Biology Form 2 Notes Pdf Download Biology Form 2 Past Papers Biology Form 2 Pdf Biology Form 2 Question Papers Biology Form 2 Questions Biology Form 2 Questions and Answers Biology Form 2 Questions and Answers Pdf Biology Form 2 Quiz Biology Form 2 Revision Notes Biology Form 2 Salts Biology Form 2 Structure and Bonding Biology Form 2 Summary Notes Biology Form 2 Syllabus Biology Form 2 Work Biology Form 3 Biology Form 3 and 4 Essays Biology Form 3 and 4 Essays Questions and Answers Biology Form 3 Chapter 3 Biology Form 3 Classification Biology Form 3 Diagrams Biology Form 3 Ecology Biology Form 3 Exams Biology Form 3 Notes Biology Form 3 Notes and Questions Biology Form 3 Notes GCSE Biology Form 3 Notes KCSE-kcse Biology Form 3 Notes Pdf Biology Form 3 Notes Pdf Download Biology Form 3 Notes Topic 1 Biology Form 3 Past Papers Biology Form 3 Pdf Biology Form 3 Question Papers Biology Form 3 Questions Biology Form 3 Questions and Answers Biology Form 3 Questions and Answers Pdf Biology Form 3 Questions and Answers Term 3 Biology Form 3 Questions and Answers+pdf Biology Form 3 Quiz Biology Form 3 Revision Notes Biology Form 3 Revision Questions Biology Form 3 Summary Notes Biology Form 3 Syllabus Biology Form 3 Syllabus Pdf Biology Form 3 Topics Biology Form 3 Work Biology Form 4 Biology Form 4 All Chapter Biology Form 4 Chapter 1 Conversion of Units Biology Form 4 Chapter 1 Exercise Biology Form 4 Chapter 1 Exercise and Answers Biology Form 4 Chapter 1 Exercise Pdf Biology Form 4 Chapter 1 Mind Map Biology Form 4 Chapter 2 Biology Form 4 Chapter 2 Exercise and Answers Biology Form 4 Chapter 2 Exercise Pdf Biology Form 4 Chapter 2 Experiment Biology Form 4 Chapter 2 Formula Biology Form 4 Chapter 2 Mind Map Biology Form 4 Chapter 2 Momentum Biology Form 4 Chapter 2 Notes Pdf Biology Form 4 Chapter 2 Objective Questions and Answers Biology Form 4 Chapter 2 Paper 2 Biology Form 4 Chapter 2 Slideshare Biology Form 4 Chapter 3 Biology Form 4 Chapter 3 Questions and Answers Biology Form 4 Chapter 4 Biology Form 4 Chapter 4 Notes Pdf Biology Form 4 Chapter 5 Light Questions and Answers Biology Form 4 Chapter 5 Notes Pdf Biology Form 4 Diagrams Biology Form 4 Exam Paper 1 Biology Form 4 Exams Biology Form 4 Exercise Biology Form 4 Exercise Pdf Biology Form 4 Module With Answer Biology Form 4 Note Biology Form 4 Notes Biology Form 4 Notes (Pdf) Biology Form 4 Notes All Chapter Pdf Biology Form 4 Notes and Questions Biology Form 4 Notes Chapter 1 Biology Form 4 Notes Chapter 2 Biology Form 4 Notes Chapter 3 Biology Form 4 Notes Download Biology Form 4 Notes Free Download Biology Form 4 Notes GCSE Biology Form 4 Notes KCSE-kcse Biology Form 4 Notes Pdf Biology Form 4 Notes Pdf Download Biology Form 4 Paper 2 Questions and Answers Biology Form 4 Past Papers Biology Form 4 Question Papers Biology Form 4 Questions Biology Form 4 Questions and Answers Biology Form 4 Questions and Answers Pdf Biology Form 4 Quiz Biology Form 4 Revision Notes Biology Form 4 Schemes of Work Biology Form 4 Summary Notes Biology Form 4 Syllabus Biology Form 4 Textbook Pdf Biology Form 4 Work Biology Form 5 Chapter 1 Exercise and Answers Biology Form 5 Chapter 1 Notes Pdf Biology Form 5 Chapter 2 Notes Pdf Biology Form 5 Chapter 2 Slideshare Biology Form 5 Chapter 3 Notes Pdf Biology Form 5 Notes Pdf Biology Form Four Book Biology Form Four Notes Biology Form Four Notes and Questions Biology Form Four Notes GCSE Biology Form Four Notes Pdf Biology Form Four Past Papers Biology Form Four Questions Biology Form Four Questions and Answers Biology Form Four Questions and Answers Pdf Biology Form Four Quiz Biology Form Four Study Notes Biology Form Four Syllabus Biology Form Four Topic 2 Biology Form Four Topic 4 Biology Form Four Topics Biology Form Four Work Biology Form One Biology Form One Book Biology Form One Book Pdf Biology Form One Download Topic 1 Upto 3 Biology Form One Exam Biology Form One Notes Biology Form One Notes and Questions Biology Form One Notes GCSE Biology Form One Notes Pdf Biology Form One Pdf Biology Form One Questions Biology Form One Questions and Answers Biology Form One Questions and Answers Pdf Biology Form One Questions and Their Answers Biology Form One Quiz Biology Form One Revision Question Biology Form One Schemes of Work Biology Form One Study Notes Biology Form One Syllabus Biology Form One Term Three Test Biology Form One to Three Notes Biology Form One Work Biology Form Three Biology Form Three Book Biology Form Three Notes Biology Form Three Notes and Questions Biology Form Three Notes GCSE Biology Form Three Questions and Answers Biology Form Three Questions and Answers Pdf Biology Form Three Quiz Biology Form Three Reproduction Biology Form Three Reproduction. Biology Form Three Study Notes Biology Form Three Work Biology Form Three-questions and Answers Biology Form Two Biology Form Two Book Biology Form Two Diagrams Biology Form Two Notes Biology Form Two Notes and Questions Biology Form Two Notes GCSE Biology Form Two Notes Pdf Biology Form Two Notes-pdf Biology Form Two Pdf Biology Form Two Questions Biology Form Two Questions and Answers Biology Form Two Questions and Answers Pdf Biology Form Two Quiz Biology Form Two Study Notes Biology Form Two Topics Biology Form Two Work Biology Form Two,schemes of Work Biology Form2 Biology Form2 Textbook Biology Game Form Four Question End Answers Biology Grade 10 Exam Papers Biology Hsc Pdf Biology Human Reproduction Video Biology IGCSE Past Papers Xtremepapers Biology K.c.s.e 2017 Biology KCSE Biology KCSE 2016 Biology KCSE 2017 Biology KCSE 2017 Paper 1 Biology KCSE Past Papers Biology KCSE Questions Biology KCSE Questions and Answer Biology KCSE Quizzes & Answers Biology KCSE Revision Biology KCSE Revision Notes Biology KCSE Setting Questions Form One and Two Biology Ksce 2015 Biology Last Year K.c.s.e Questions Biology Lesson Plan Form Two Biology Made Familiar Biology Mcq for Class 11 Biology Mcq for Class 12 Biology Mcq for Competitive Exams Biology Mcq for Competitive Exams Pdf Biology Mcq for Neet Pdf Biology Mcq for Ssc Biology Mcq Questions With Answers Biology Mcq With Answers Pdf Biology Mcqs for Class 12 Pdf Biology Mcqs With Answers Pdf Biology Mid Familia Form One Biology Mock Papers Biology Module Form 5 Biology Multiple Choice Questions and Answers Cxc Biology Multiple Choice Questions and Answers Pdf Biology Multiple Choice Questions With Answers Pdf Biology Note Biology Note Form Two All Chapters Biology Notes Biology Notes and Guestion and Answear Biology Notes and Syllabus Biology Notes Class 10 Biology Notes for Class 11 Pdf Biology Notes for Class 12 Pdf Biology Notes for High School Students Biology Notes for IGCSE 2014 Biology Notes Form 1 Biology Notes Form 1 4 Biology Notes Form 1 Free Download Biology Notes Form 1 KLB Biology Notes Form 1 Pdf Biology Notes Form 1-4 Biology Notes Form 1-4(1) Biology Biology Notes Form 14 Biology Notes Form 2 Biology Notes Form 2 KLB Biology Notes Form 2 Pdf Biology Notes Form 2; Biology Notes Biology Notes Form 3 Biology Notes Form 3 KLB Biology Notes Form 3 Pdf Biology Notes Form 4 Biology Notes Form 4 Chapter 2 Biology Notes Form 4 KLB Biology Notes Form 4 Pdf Biology Notes Form 4-pdf Biology Notes Form Four Biology Notes Form Four KLB Biology Notes Form Four Pdf Biology Notes Form One Biology Notes Form One KLB Biology Notes Form One Pdf Biology Notes Form One to Form Four Biology Notes Form Three Biology Notes Form Three KLB Biology Notes Form Three Pdf Biology Notes Form Two Biology Notes Form Two KLB Biology Notes Form Two Pdf Biology Notes Form2 Biology Notes IGCSE Biology Notes Kenya Biology Notes on Agroforestry Biology Notes Pdf Biology Notes: Biology Objective Answer Biology Objective Answer 2018 Biology Objective Questions for Competitive Exams Biology Objective Questions for Competitive Exams Pdf Biology Oral Exam Questions Biology Paper 1 Biology Paper 1 2018 Marking Rules Biology Paper 1 Notes Biology Paper 1 Questions Biology Paper 1 Questions and Answers Biology Paper 1 Topics Biology Paper 1 With Answers Biology Paper 2 Biology Paper 2 2017 Biology Paper 2 2018 Marking Rules Biology Paper 2 Questions and Answers Biology Paper 2 Questions and Answers Pdf Biology Paper 2 Revision Biology Paper 2 Topics Biology Paper 2018 Biology Paper 3 2018 Marking Rules Biology Paper 3 Question and Answer Biology Paper 3 Question Paper 2014 KCSE Biology Paper 3 Question Paper 2015 KCSE Biology Paper 3 Question Paper 2016 KCSE Biology Paper 3 Question Paper 2017 KCSE Biology Paper 3 Question Paper 2018 KCSE Biology Paper 3 Questions and Answers Biology Paper One Questions and Answers Biology Paper One Topics Biology Paper Two Qestions With Answers Biology Paper1 Biology Paper2 Biology Paper3 Biology Paper4 Biology Past Papers Biology Past Papers 2017 Biology Past Papers a Level Biology Past Papers Form 1 Biology Past Papers Form 2 Biology Past Papers Form 3 Biology Past Papers O Level Biology Pdf Download Biology Pp1 KCSE 2016 Biology Practical Book Class 12 Pdf Biology Practical Exam Biology Practicals Form One Biology Practicals Questions and Answers Biology Practice Test 9th Grade Biology Practice Test Answers Biology Practice Test Questions and Answers Biology Practice Test Quizlet Biology Predicted Questions This Year KCSE Biology Preparation Notes Biology Pretest High School Pdf Biology Question and Answer With Explanation Biology Question and Answers 2019 Biology Question and Answers 2020 Biology Question and Answers 2021 Biology Question and Answers 2022 Biology Question and Answers 2025 Biology Question and Answers 2026 Biology Question and Answers Note Biology Questions Biology Questions and Answers Biology Questions and Answers for High School Biology Questions and Answers for High Schools Biology Questions and Answers for High Schools Pdf Biology Questions and Answers for Secondary Schools Biology Questions and Answers Form 1 Biology Questions and Answers Form 2 Biology Questions and Answers Form 3 Biology Questions and Answers Form 4 Biology Questions and Answers Multiple Choice Biology Questions and Answers Notes Biology Questions and Answers O Biology Questions and Answers on Cells Biology Questions and Answers Online Biology Questions and Answers Pdf Biology Questions and Answers Pdf for Class 12 Biology Questions and Answers Pdf for Competitive Exams Biology Questions and Answers-form 2 Biology Questions for High School Biology Questions for High School Students With Answers Biology Questions for Senior 1 Biology Questions for Senior 2 Biology Questions for Senior 3 Biology Questions for Senior 4 Biology Questions for Senior 5 Biology Questions for Senior 6 Biology Questions for Senior Five Biology Questions for Senior Four Biology Questions for Senior One Biology Questions for Senior Six Biology Questions for Senior Three Biology Questions for Senior Two Biology Questions Form One Biology Questions Multiple Choice Biology Questions Quizlet Biology Questions to Ask Your Teacher Biology Quetion and Answer Form Four Biology Quetion and Answer Form One Biology Quetion and Answer Form Three Biology Quetion and Answer Form Two Biology Quiz for Class 9 Biology Quiz for Class 9 Biology Biology Quiz Questions and Answers for Class 10 Biology Quiz Questions and Answers for Class 10 Pdf Biology Quiz Questions and Answers for Class 12 Biology Quiz Questions and Answers for Class 9 Biology Quiz Questions and Answers for Class 9 Pdf Biology Quiz Questions and Answers for High School Biology Quiz Questions and Answers Multiple Choice Biology Quiz Questions and Answers Pdf Biology Quiz Questions for Class 12 Biology Quiz Questions for College Students Biology Quiz With Answers Biology Quiz With Answers Pdf Biology Quizlet Biology Revision Biology Revision a Level Biology Revision Biology Notes Biology Biology Revision Exam Biology Revision Examination Biology Revision Form One Biology Revision Notes Biology Revision Notes Biology Biology Revision Notes Form 1 Biology Revision Notes Form 2 Biology Revision Notes Form 3 Biology Revision Notes Form 4 Biology Revision Notes IGCSE Biology Revision Paper One Biology Revision Questions Biology Revision Questions and Answers Biology Revision Questions and Answers Form 1 Biology Revision Questions and Answers Form 2 Biology Revision Questions and Answers Form 3 Biology Revision Questions and Answers Form 4 Biology Revision Questions and Answers Form Four Biology Revision Questions and Answers Form One Biology Revision Questions and Answers Form Three Biology Revision Questions and Answers Form Two Biology Revision Questions Form 1 Biology Revision Questions Form 2 Biology Revision Questions Form 3 Biology Revision Questions Form 4 Biology Revision Questions Form Four Biology Revision Questions Form One Biology Revision Questions Form Three Biology Revision Questions Form Two Biology Revision Quiz Biology Revision Test Biology Secondary School Revision Biology Simple Notes Biology Spm Notes Download Biology Spm Notes Pdf Biology Spm Questions Biology Study Form 2 Biology Study Guide Biology Study Guide Answer Key Biology Study Guide Answers Biology Study Guide Biology Questions and Answers Biology Study Guide Ib Biology Study Guide Pdf Biology Study Guides Biology Study Notes Biology Study Notes Materials Form 1 Pdf Biology Study Notes Materials Form 2 3 Pdf Biology Study Notes Materials Form 2 Pdf Biology Study Notes Materials Form 3 Pdf Biology Study Notes Materials Form 4 Pdf Biology Syllabus in Kenya Biology Syllabus Pdf Biology Test 1 Quizlet Biology Test Questions Biology Test Questions and Answers Biology Test Questions and Answers Pdf Biology Topic One Form Four Biology Topics Form One Biology Unit 1 Quiz Biology Vol 3 Biology | Revision Biology Biology,form 4 Biology.form Four.topic Three BiologyExam Form Three BiologyModule Form 5 BiologyNotes BiologyNotes for Class 11 Pdf BiologyNotes for Class 12 Pdf BiologyNotes Form 1 BiologyNotes Form 1 Free Download BiologyNotes Form 2 BiologyNotes Form 3 BiologyNotes Form 3 Pdf BiologyNotes IGCSE BiologyNotes Pdf BiologyPast Papers BiologyQuestions and Answers Pdf BiologySimple Notes BiologySpm Notes Download BiologySpm Notes Pdf BiologySpm Questions BiologyStudy Guide Answers BiologyStudy Guide Pdf BiologyStudy Guides Blologytextpapers Bridge Biology Business Past KCSE Past Papers Business Studies Form 3 Notes Pdf Business Studies Form 4 Notes Pdf C R E Form One KLB C R E Form One Oli Topic C.r.e Form 1 Notes Kenya C.r.e Form 2 Notes Kenya C.r.e Form 3 Notes C.r.e Form 3 Notes Kenya C.r.e Form 3 Pdf C.r.e Form 4 Notes Kenya C.r.e Form One Notes Pdf C.r.e Notes Form 1 C.r.e Revision Notes C.r.e Short Notes Cambridge IGCSE Biology Cambridge IGCSE Biology 3rd Edition Cambridge IGCSE Biology 3rd Edition Plus Cd South Asia Edition Cambridge IGCSE Biology Answers Cambridge IGCSE Biology Coursebook Pdf Download Cambridge IGCSE Biology Practical Workbook Cambridge IGCSE Biology Revision Guide Pdf Cambridge IGCSE Biology Study and Revision Guide 2nd Edition Pdf Cambridge IGCSE Biology Study and Revision Guide Pdf Cambridge IGCSE Biology Workbook Free Download Cambridge IGCSE Biology Workbook Pdf Cambridge IGCSE® Biology Coursebook Caucasian Chalk Circle Essay Questions Cell Biology Exam Questions and Answers Cell Biology Exam Questions Pdf Cell Biology Mcq With Answers Cell Biology Multiple Choice Questions and Answers Pdf Cell Biology Multiple Choice Questions Pdf Cell Biology Previous Question Papers Cell Biology Question Bank Cell Biology Question Bank Pdf Cell Biology Question Paper Pdf Cell Biology Questions and Answers Multiple Choice Cell Biology Questions and Answers Multiple Choice Pdf Cell Biology Questions and Answers Pdf Cell Biology Questions and Answers Pdf in Hindi Cell Biology Short Answer Questions Cell Biology Test Bank Questions Cell Biology Test Questions and Answers Cell Biology Test Questions and Answers Pdf Cell Mcq Pdf Cell Organelles Labeling Quiz Cell Organelles Multiple Choice Questions and Answers Cell Questions and Answers Cell Questions and Answers Pdf Cell Questions Quizlet Cell Structure and Function Pdf Cell Structure and Function Pdf Class 11 Cell Structure and Function Quiz Answers Cell Structure and Function Test Answer Key Cell Structure and Function Test Pdf Cells Cells Questions Cellular Organization Pdf Chapter 1 Introduction to Biology Chapter 1 Introduction to Biology Studies Chemical Equation for Aerobic Respiration Cie a Level Biology Notes 2016 Cie a Level Biology Notes Pdf Cie Past Papers Class 10 Biology Chapter 1 Mcqs Class 8 Biology Notes KCSE-kcse College Biology Notes College Biology Practice Test College Biology Quiz College Biology Quiz Chapter 1 College Biology Quizlet College Biology Study Guide College Biology Study Guide Pdf College Biology Test Questions and Answers College Biology Volume 3 Pdf College BiologyNotes Complete Biology for Cambridge IGCSE Complete Biology for Cambridge IGCSE Revision Guide Pdf County Mocks 2017 Cse Past Papers Biology 2017 Cytology Mcqs With Answers Pdf Difficult Questions on Gaseous Exchange in Animals Dl Biology Form 3 Pdf Kusoma Download Biology Form 1 Download Biology Form 2 Download Biology Form 2 Notes Download Biology Form 3 Download Biology Form 3 Notes Download Biology Form 4 Download Biology Form Four Download Biology Form One Download Biology Form Three Download Biology Form Two Download Biology Notes Form 3 Download Biology Notes Form One Download BiologyNotes Form 3 Download Form Three Biology Notes Download Free KCSE Past Papers Biology Download Free KCSE Past Papers From KNEC. Download KCSE Past Papers With Answers Download KCSE Revision Notes Download KLB Biology Book 2 Download KLB Biology Book 3 Download KLB Biology Book 4 Download Notes of Biology Downloads | Biology | Form Four Exams | Exams Downloads | Biology | Form One Exams | Exams Downloads | Biology | Form Three Exams | Exams Downloads | Biology | Form Two Exams | Exams Downloads | KCSE Papers and Marking Schemes | Dvance KCSE Past Papers Easy Biology Questions Easy Cell Questions Edexcel a Level Biology B Edexcel a Level Biology Notes Pdf Edexcel a Level Biology Salters Nuffield Edexcel A2 Biology Notes Edexcel as Biology Revision Guide Pdf Edexcel Biology A2 Revision Notes Pdf Edexcel Biology Unit 2 Revision Notes Edexcel GCSE Biology Revision Guide Pdf Edexcel IGCSE Biology Past Papers Edexcel IGCSE Biology Revision Guide Free Pdf Download Edexcel IGCSE Biology Revision Guide Pdf Edexcel IGCSE Biology Revision Guide Pdf Download Electronics Form Four Notes Energy Questions Biology Bowl Essay Questions and Answers KCSE Biology Notes Essay Questions and Answers on Betrayal in the City Essay Questions Based on Betrayal in the City Essential Cell Biology Test Bank Answers Essential Cell Biology Test Bank Download Free Evolving World Biology Book 1 Pdf Evolving World Biology Book 4 Notes Evolving World Biology Book Form 1 Evolving World-history Book 3 Exam Notes for Biology 101 Exams KCSE Biology Paper 1 Questions and Answers Excretion Question and Answer Form 4 Work Excretion Questions and Answers Excretory System Questions and Answers Pdf Excretory System Structure F3 Biology Test Paper Find Download KCSE Past Papers With Answers Find KCSE Biology Essay Questions and Answers Form 1 Biology Exam Form 1 Biology Notes Form 1 Biology Questions and Answers Form 1 Biology Questions and Answers Pdf Form 1 Biology Revision Notes Form 1 Biology Summurized Revision Pdf Form 1 Biology Syllabus Form 1 Biology Test Paper Pdf Form 1 Biology Topics Form 1 BiologyNotes Form 1 BiologyQuestions and Answers Form 1 BiologyRevision Notes Form 1 BiologySyllabus Form 1 BiologyTest Paper Pdf Form 1 Past Papers Form 1 Past Papers With Answers Form 1 Revision Papers Form 1 Subjects in Kenya Form 2 Biology Exam Form 2 Biology Exam Paper Form 2 Biology Exam Paper 2016 Form 2 Biology Exam Paper Free Download Form 2 Biology Exam Paper With Answer Form 2 Biology Final Year Exam Paper 2 Form 2 Biology Notes Form 2 Biology Notes and Revision Questions Form 2 Biology Notes Pdf Form 2 Biology Past Papers Form 2 Biology Questions Form 2 Biology Questions and Answers Form 2 Biology Questions and Answers > Form 2 Biology Questions and Answers Pdf Form 2 Biology Revision Notes Form 2 Biology Short Notes Form 2 Biology Syllabus Form 2 BiologyExam Paper Form 2 BiologyExam Paper Free Download Form 2 BiologyExam Paper With Answer Form 2 BiologyFinal Year Exam Paper 2 Form 2 BiologyPast Papers Form 2 BiologyRevision Notes Form 2 BiologyShort Notes Form 2 BiologySyllabus Form 2 Revision Papers Form 2 Subjects in Kenya Form 3 Biology Book Form 3 Biology Exam Form 3 Biology Exam Paper Form 3 Biology Notes Form 3 Biology Past Papers Form 3 Biology Questions Form 3 Biology Questions and Answers Form 3 Biology Questions and Answers Pdf Form 3 Biology Revision Notes Form 3 Biology Syllabus Form 3 BiologyExam Paper Form 3 BiologyNotes Form 3 BiologyPast Papers Form 3 BiologyQuestions Form 3 BiologyQuestions and Answers Pdf Form 3 BiologyRevision Notes Form 3 BiologySyllabus Form 3 C.r.e Form 3 Notes of Biology Topic on Fish Form 3 Past Papers Form 3 Revision Papers Form 3 Subjects in Kenya Form 4 Biology Exam Form 4 Biology Notes Form 4 Biology Notes Pdf Form 4 Biology Questions and Answers Form 4 Biology Questions and Answers Pdf Form 4 Biology Revision Notes Form 4 Biology Syllabus Form 4 Biology Topics Form 4 BiologyNotes Form 4 BiologyRevision Notes Form 4 BiologySyllabus Form 4 BiologyTopics Form 4 Exam Papers Form 4 Revision Papers Form 4 Subjects in Kenya Form 5 Biology Topics Form 5 BiologyTopics Form Five Biology Notes Form Five BiologyNotes Form Four Biology Book Form Four Biology Notes Form Four Biology Notes Pdf Form Four Biology Questions and Answers Form Four Biology Questions and Answers Pdf Form Four Biology Revision Questions Form Four Biology Syllabus Form Four Biology Topics Form Four BiologyNotes Form Four BiologyQuestions and Answers Form Four BiologyQuestions and Answers Pdf Form Four BiologyTopics Form Four Notes Form Four Revision Papers Form Four Subjects in Kenya Form One Biology Book Form One Biology Examination Form One Biology First Topic Form One Biology Lesson Plan Form One Biology Notes Pdf Form One Biology Past Papers Pdf Form One Biology Questions Form One Biology Questions and Answers Form One Biology Questions and Answers Pdf Form One Biology Revision Questions Form One Biology Short Notes Form One Biology Syllabus Form One Biology Topics Form One BiologyExamination Form One BiologyPast Papers Pdf Form One BiologyQuestions and Answers Form One BiologyQuestions and Answers Pdf Form One BiologyTopics Form One Exams Form One Notes of Biology Form One Past Papers Form One Subjects in Kenya Form One Term One Biology Exam Form One Term One BiologyExam Form Three Biology Book Form Three Biology Book Pdf Form Three Biology Notes Form Three Biology Notes Pdf Form Three Biology Questions and Answers Form Three Biology Questions and Answers Pdf Form Three Biology Revision Questions Form Three Biology Syllabus Form Three Biology Topics Form Three BiologyNotes Form Three BiologyNotes Pdf Form Three BiologyQuestions and Answers Form Three BiologyQuestions and Answers Pdf Form Three BiologyTopics Form Three Subjects in Kenya Form Two Biology Book Form Two Biology Cat Form Two Biology Examination Form Two Biology Notes Form Two Biology Notes Pdf Form Two Biology Past Papers Form Two Biology Questions and Answers Form Two Biology Questions and Answers Pdf Form Two Biology Revision Questions Form Two Biology Syllabus Form Two Biology Topics Form Two BiologyNotes Form Two BiologyNotes Pdf Form Two BiologyQuestions and Answers Form Two BiologyQuestions and Answers Pdf Form Two BiologySyllabus Form Two BiologyTopics Form Two Notes Form Two Subjects in Kenya Free a-level Biology Revision App | Pass Your Biology Exams Free Biology Form 1 Notes Free Biology Notes Form 1 Free Biology Notes Pdf Free BiologyNotes Pdf Free College Biology Practice Test Free Form1,form2,form3 Past Papers Free KCSE Past Papers Free KCSE Mocks 2015 Free KCSE Past Papers 2014 Free KCSE Past Papers KCSE Past Free KCSE Past Papers Kenya, Free KCSE Past Papers With Answers Free KCSE Questions and Answers on Biology Free KCSE Revision Notes Free Marking Schemes Free Mocks Online KCSE Answers Past Exams Question Papers Free Revision Papers From Three Notes Topic One KLB Fun Biology Questions Funny Biology Questions Funny Biology Questions and Answers Funny Biology Questions to Ask Funny Biology Quotes Gas Exchange Exam Questions Gas Exchange Practice Test Gas Exchange Quiz GCSE Biology Exam Questions and Answers GCSE Biology Past Papers GCSE Biology Revision GCSE Biology Revision Notes GCSE Biology Revision Notes Pdf GCSE Biology Revision Notes Pdf 9-1 GCSE Biology Revision Questions and Answers GCSE Biology Textbook Pdf GCSE Biology Topics Pass My Exams: Easy Exam Revision Notes General Biology Notes Pdf General Biology Practice Test With Answers General Biology Quiz General Biology Quiz Pdf General Biology Test Questions and Answers General Biology Test Questions and Answers Pdf General Knowledge in Biology Human Body Good Biology Questions to Ask GRE Biology Practice Test GRE Biology Subject Test Pdf Handbook of Biology Pdf Free Download Hard Biology Questions Hard Biology Questions and Answers Hard Biology Questions to Ask Your Teacher Hard Biology Quiz Questions Hard Form 3 Biology Question High School Biology Final Exam Doc High School Biology Final Exam Pdf High School Biology Final Exam Questions High School Biology Final Exam Questions and Answers High School Biology Notes High School Biology Practice Test High School Biology Pretest With Answers High School Biology Questions and Answers Pdf High School Biology Study Guide High School Biology Test Questions and Answers Pdf High School BiologyNotes High School BiologyStudy Guide How Does the Excretory System Work How Many Chromosomes Do Gametes Have How Many Copies of Each Gene Do Gametes Have How Much Genetic Information Is Found in a Gamete How to Answer KCSE Biology Question How to Motivate a Form 4 Student How to Motivate a KCSE Candidate How to Motivate a KCSE Student How to Pass Biology Questions & Answers Form 1&2 | Text Book How to Revise Biology How to Revise Effectively for KCSE How to Study Biology: 5 Study Techniques to Master Biology Hsc Biology 2018 Hsc Biology 2019 Https://www.knec.ac.ke/ Www.knec-portal.ac.ke/ KNEC Portal: Ial Biology Notes Ib Biology Cold War Notes Ib Biology Notes Ib Biology Notes Pdf Ib Biology of the Americas Notes Ib Biology of the Americas Study Guide Ib Biology Paper 2 Study Guide Ib Biology Question Bank by Topic Ib Biology Study Guide Pdf Ict Notes Form 1 IGCSE Biology Alternative to Practical Revision IGCSE Biology Alternative to Practical Revision Notes IGCSE Biology Book IGCSE Biology Book Pdf Download IGCSE Biology Notes IGCSE Biology Notes 2017 Pdf IGCSE Biology Notes Edexcel IGCSE Biology Paper 2 Notes IGCSE Biology Paper 6 Notes IGCSE Biology Past Papers IGCSE Biology Past Papers 2014 IGCSE Biology Past Papers 2017 IGCSE Biology Pdf IGCSE Biology Pre Release Material 2018 IGCSE Biology Resources IGCSE Biology Revision Guide IGCSE Biology Revision Guide Free Download IGCSE Biology Revision Guide Pdf Download IGCSE Biology Revision Notes Pdf IGCSE Biology Revision Worksheets IGCSE Biology Workbook Pdf IGCSE Biology Znotes IGCSE BiologyPast Papers IGCSE Notes Biology Importance of Agroforestry Inorganic Biology Multiple Choice Questions With Answers Pdf Inorganic Biology Questions and Answers Pdf Interesting Biology Questions Interesting Biology Questions and Answers Interesting Questions to Ask About Biology Intro to Biology Quiz Introduction of Biology Form One Introduction to Biology Introduction to Biology Notes Introduction to Biology Pdf Introduction to BiologyNotes Is Agroforestry Sustainable? K.c.s.e Answers Biology Paper One 2018 K.c.s.e Biology 2017 K.c.s.e Biology 2018 K.c.s.e Biology Paper 1 2017 K.c.s.e Mocks 2018 K.c.s.e Papers 2015 K.c.s.e Papers 2016 K.c.s.e Past Papers 2014 K.c.s.e.Biology Paper 2 Year 2018 K.c.s.e.results 2018 for Busia County K.l.b Biology Form 3 K.l.b Biology Notes K.l.b BiologyNotes Kasneb Past Papers for Colleges Biology Past Papers KCSE 2010 Marking Scheme KCSE 2010 Past Papers KCSE 2011 Biology Paper 1 KCSE 2011 Marking Scheme KCSE 2012 Biology Paper 2 Marking Scheme KCSE 2012 Marking Schemes KCSE 2013 Biology Paper 1 KCSE 2013 Marking Scheme KCSE 2013 Marking Scheme Pdf KCSE 2014 KCSE 2015 Biology Paper 2 KCSE 2015 Biology Paper 3 KCSE 2015 Marking Scheme KCSE 2015 Past Papers KCSE 2016 Biology Paper 1 KCSE 2016 Biology Paper 2 KCSE 2017 Biology Paper 1 KCSE 2017 Biology Paper 2 KCSE 2017 Hostory Papers With Answers.com KCSE 2017 Marking Scheme KCSE 2017 Papers KCSE 2017 Papers and Marking Scheme KCSE 2017 Papers Pdf KCSE 2017 Past Papers KCSE 2017 Prediction Pdf KCSE 2018 Biology and Answers KCSE 2018 Biology Prediction KCSE 2018 Leakage KCSE 2018 Marking Scheme KCSE 2018 Papers KCSE 2018 Prediction Pdf KCSE 2018 Predictions KCSE 2018 Questions KCSE 2018 Questions and Answers KCSE 2019 Leakage Biology KCSE 2019 Marking Scheme KCSE 2019 Questions KCSE 2019 Questions and Answers KCSE 2020 Questions KCSE 2020 Questions and Answers KCSE Answers KCSE Answers Past Exams Question Papers Downloads | KCSE Biology 2011 KCSE Biology 2016 KCSE Biology Diagramsbiology Revision Tips KCSE Biology Essay Questions and Answers KCSE Biology Essay Questions and Answers Pdf KCSE Biology Essays KCSE Biology Essays Pdf KCSE Biology Marking Schemes KCSE Biology Notes KCSE Biology Notes Pdf KCSE Biology Notes, Syllabus, Questions, Answers KCSE Biology Paper 1 KCSE Biology Paper 1 2011 KCSE Biology Paper 1 2012 KCSE Biology Paper 1 2013 KCSE Biology Paper 1 2015 KCSE Biology Paper 1 2016 KCSE Biology Paper 1 2017 KCSE Biology Paper 1 2017 Pdf KCSE Biology Paper 1 Questions and Answers KCSE Biology Paper 2 KCSE Biology Paper 2 2012 KCSE Biology Paper 2 2012 KCSE Biology Paper 2 2015 KCSE Biology Paper 2 2013 KCSE Biology Paper 2 2014 KCSE Biology Paper 2 2015 KCSE Biology Paper 2 2016 KCSE Biology Paper 2 2017 KCSE Biology Paper 3 KCSE Biology Paper 3 2012 KCSE Biology Paper 3 2016 KCSE Biology Paper 3 2017 KCSE Biology Paper 3 Past Papers KCSE Biology Past Papers KCSE Biology Past Papers and Answers KCSE Biology Past Papers Pdf KCSE Biology Practical KCSE Biology Practical 2015 KCSE Biology Practical 2016 KCSE Biology Practical Past Papers KCSE Biology Practicals KCSE Biology Practicals KCSE Biology Paper 1 KCSE Biology Question and Answer KCSE Biology Questions and Answers KCSE Biology Questions and Answers Ap Biology KCSE Biology Revision KCSE Biology Revision Notes KCSE Biology Revision Papers KCSE Biology Revision Questions KCSE Biology Revision Questions and Answers KCSE Biology Syllabus KCSE BiologyNotes KCSE BiologyPaper 1 KCSE BiologyPaper 2 KCSE BiologyPaper 2 Pdf KCSE BiologySyllabus KCSE Business Paper 1 2016 KCSE Business Past Papers KCSE Business Studies Past Papers KCSE Essay Questions in Betrayal in the City KCSE Essays KCSE Exam Papers 2018 KCSE Exam Papers Answers KCSE Form 1 Biology Revision KCSE Form 2 Biology Revision KCSE Form 3 Biology Revision KCSE Form 4 Biology Revision KCSE Form Four Biology Revision KCSE Form One Biology Revision KCSE Form Three Biology Revision KCSE Form Two Biology Revision KCSE KCSE Past Papers KNEC KCSE Leakage KCSE Leakage Biology KCSE Made Familiar Biology KCSE Made Familiar Biology Pdf KCSE Marking Scheme 2016 KCSE Marking Schemes KCSE Marking Schemes 2017 KCSE Marking Schemes Pdf KCSE Mock Exams KCSE Mock Papers 2015 KCSE Mock Papers 2017 KCSE Mock Papers 2018 KCSE Mock Papers Pdf KCSE Mock Papers Pdf 2018 KCSE Mock Papers Pdf KCSE Past Papers KCSE Mocks 2017 KCSE Mocks 2018 KCSE Notes KCSE Online Notes KCSE Online Past Papers KCSE Online Registration KCSE Papers 2015 KCSE Papers and Marking Schemes | Exams KCSE Past Papers KCSE Past Papers 2007 KCSE Past Papers 2009 KCSE Past Papers 2010 KCSE Past Papers 2011 KCSE Past Papers 2011 Pdf KCSE Past Papers 2012 KCSE Past Papers 2013 KCSE Past Papers 2013knec KCSE Past Papers 2014 KCSE Past Papers 2014 Pdf KCSE Past Papers 2015 KCSE Past Papers 2015 Marking Schemes KCSE Past Papers 2015 Pdf KCSE Past Papers 2016 KCSE Past Papers 2016 Pdf KCSE Past Papers 2017 KCSE Past Papers 2017 Pdf KCSE Past Papers 2018 KCSE Past Papers Biology KCSE Past Papers Biology and Answers KCSE Past Papers Biology Pdf KCSE Past Papers Biology With Answers KCSE Past Papers Biologyand Answers KCSE Past Papers Business Studies and Answers KCSE Past Papers KCSE and Answers KCSE Past Papers KCSE and Answers Free Mocks Online KCSE Past Papers Marking Scheme KCSE Past Papers Pdf Download KCSE Past Papers Pdf Download KCSE 2013 KCSE Past Papers With Answers KCSE Past Papers Woodwork and Answers KCSE Prediction 2017 KCSE Prediction 2018 KCSE Prediction 2018 Pdf KCSE Prediction Papers 2018 KCSE Prediction Questions KCSE Prediction Questions 2018 KCSE Prediction Questions and Answers KCSE Questions KCSE Questions and Answers KCSE Questions and Answers. KCSE Questions on Biology KCSE Results, Online Registration, KCSE Result Slip. KCSE Revision KCSE Revision Notes KCSE Revision Notes Biology KCSE Revision Notes Pdf KCSE Revision Papers KCSE Revision Papers 2014 KCSE Revision Papers With Answers KCSE Revision Question for Biology KCSE Revision Questions KCSE Revision Questions and Answers KCSE Revision | Secondary School | Text Books | Text Book Centre KCSE Syllabus Pdf KCSE Trial 2017 KCSE Trial Exams 2017 Kenya Secondary School Biology Syllabus Kenya Secondary School Biology Syllabus Pdf Kenya Secondary School BiologySyllabus Pdf Kenya Secondary School Syllabus Pdf Kenya-kcse-christian Religious Education Syllabus Kenyaplex KCSE Past Papers Kenyaplex Past Papers for Secondary KLB Biology Book 1 Download KLB Biology Book 1 Notes KLB Biology Book 1 Pdf KLB Biology Book 2 KLB Biology Book 2 Notes KLB Biology Book 2 Notes Pdf KLB Biology Book 2 Pdf KLB Biology Book 3 Notes KLB Biology Book 3 Pdf KLB Biology Book 3 Pdf Download KLB Biology Book 4 Notes KLB Biology Book 4 Pdf KLB Biology Book 4 Pdf Download KLB Biology Book 4 Topics KLB Biology Book One KLB Biology Form 1 KLB Biology Form 1 Notes KLB Biology Form 1 Pdf KLB Biology Form 2 KLB Biology Form 2 Book KLB Biology Form 2 Notes KLB Biology Form 2 Pdf KLB Biology Form 2 Pdf Download KLB Biology Form 2 Schemes of Work KLB Biology Form 3 KLB Biology Form 3 Notes KLB Biology Form 3 Notes Pdf KLB Biology Form 3 Pdf KLB Biology Form 3 Pdf Download KLB Biology Form 4 KLB Biology Form 4 Notes KLB Biology Form 4 Pdf KLB Biology Form Four KLB Biology Form Four Notes KLB Biology Form One KLB Biology Form One Notes KLB Biology Form Three KLB Biology Form Three Notes KLB Biology Form Two KLB Biology Form Two Notes KLB Biology Notes KLB Biology Notes Form 4 KLB Biology Pdf KLB BiologyNotes KLB BiologyNotes Form 4 KLB BiologyPdf KNEC Biology Syllabus KNEC Examiners Portal KNEC Website KNEC Ict Past Papers KNEC Past Papers for Colleges KNEC Past Papers Free Download KNEC Past Papers Free Downloads KNEC Past Papers Pdf KNEC Portal Confirmation KNEC Portal KCSE Results KNEC Portal KNEC Past Papers for Colleges Kasneb Past Papers KNEC Revision Papers KNEC Technical Exams Past Papers Kusoma Biology Notes Kusoma Biology Notes Pdf Kusoma Notes Biology Kusoma.co.ke Kusoma.com Past Papers Learner Guide for Cambridge IGCSE Biology Longhorn Biology Book 3 Pdf Made Familiar Biology Made Familiar Biology Pdf Made Familiar Biology Questions Maktaba Tetea Notes Marking Scheme KCSE Biology Past Papers Math Form2 Note Mcq on Cell Biology Class 9 Mcqs About Gaseous Exchange Middle School Biology Bowl Biology Questions Mock Past Papers 2017 Mock Past Papers With Answers Mokasa Mock 2017 More Than 1800 Biology Questions and Answers to Help You Study Multiple Choice Questions on Biology Multiple Choice Questions on Cell Structure and Function Necta Biology Past Papers Necta Biology Practicals Necta BiologyPast Papers Necta BiologyPracticals Necta Form Four Past Papers Necta Past Papers Form 4 Necta Past Papers Form 4 2016 Necta Past Papers Form Six Necta Past Papers Form Two Necta Questions and Answers Necta Review Questions Notes Biology Form 1 Notes Biology Form 2 Notes Biology Form 3 Notes Biology Form 3 Notes Pdf Notes Biology Form 3 Syllabus Notes Biology Form 4 Syllabus Notes on Biology Studies Notes Za Biology 4m 2 Notes Za Biology Form One Notes Za Biology Form Three O Level Biology Practical Experiments O Level Biology Questions and Answers Pdf Orm Three Biology Notes Page Navigation Papacambridge Biology IGCSE Papers KNEC KCSE Online Past Papers KNEC KCSE Results Past Papers Past KCSE Papers Past Paper Questions by Topic Biology Past Papers 2014 Past Papers in Kenya Pdf Biology Form 3 Pdf Biology Notes Pdf Biology Notes Form 1 Pdf Biology Notes Form 2 Pdf Biology Notes Form 3 Pdf Biology Notes Form 4 Pdf Biology Notes Form Four Pdf Biology Notes Form One Pdf Biology Notes Form Three Pdf Biology Notes Form Two Pdf Form 1 Biology Questions and Answers Pdf Form 2 Biology Questions and Answers Pdf Form 3 Biology Questions and Answers Pdf Form 4 Biology Questions and Answers Pdf Form Four Biology Questions and Answers Pdf Form One Biology Questions and Answers Pdf Form Three Biology Questions and Answers Pdf Form Two Biology Questions and Answers Pdf Free KCSE Past Papers and Marking Schemes Pdf" Revision Questions Biology Form 1 Plant and Animal Cell Organelles Quiz Plant and Animal Cell Organelles Quiz Answers Plant and Animal Cell Quiz for 5th Grade Plant and Animal Cell Quiz Grade 8 Plant and Animal Cell Quiz Pdf Plant Cell Plant Cell Pdf Download Plant Cell Questions and Answers Plant Cell Test Questions Practical Biology Experiments Pdf Practical Biology Question and Answer Pdf Pre Mocks 2018 Preliminary Biology Primary and Secondary Tillage Implements Ppt Pte KNEC Past Papers Questions About Cells Biology Questions and Answers on Gaseous Exchange Questions and Answers Pdf Biology Form 1 Questions and Answers Pdf Biology Form 2 Questions and Answers Pdf Biology Form 3 Questions and Answers Pdf Biology Form 4 Questions and Answers Pdf Biology Form Four Questions and Answers Pdf Biology Form One Questions and Answers Pdf Biology Form Three Questions and Answers Pdf Biology Form Two Questions Based to Introduction to Biology Questions on Cell Structure and Function Questions on Gaseous Exchange in Humans Questions on Introduction to Biology Questions to Ask in Biology Class Questions to Confuse Your Biology Teacher Quizlet Biology Cells Quizlet Biology Test Quizlet Test Questions Qustions in Biology and Answers Radioactivity Form Four Respiration and Gas Exchange Worksheet Respiration Notes My Elim Form Two Revision Revision Biology Notes and Questions? Revision Quiz for Biology for Form Three S.1 Biology Questions S.2 Biology Questions S.3 Biology Questions S.4 Biology Questions Sample Essays on Betrayal in the City School Biology Notes Secondary Biology Notes Secondary Biology Notes Pdf Secondary BiologyNotes Pdf Senior 1 Biology Notes Senior 2 Biology Notes Senior 3 Biology Notes Senior 4 Biology Notes Senior 5 Biology Notes Senior 6 Biology Notes Senior Five Biology Notes Senior Four Biology Notes Senior One Biology Notes Senior Six Biology Notes Senior Three Biology Notes Senior Two Biology Notes Simple Scientific Questions Smart Questions to Ask a Biology Teacher Snab Biology Revision Notes Southwest Mock Paper 2 2016 Biology Only Spm Biology Revision Notes Spm Notes Success Biology Spm Pdf Success BiologySpm Pdf Summary of Biology Form 3 Tahossa Past Papers The Animal Cell Quiz Answers The Excretory System Answer Key The Excretory System Worksheet Answers The Plant Cell Quiz Answer Key To Motivate a Form 4 KCSE Student To Motivate a Form 4 Student Topical Revision Material Tricky Biology Questions and Answers Tricky Biology Questions for Adults Tricky Biology Questions With Answers Tricky Biology Quiz Questions Two Biology Revision Questions Types of Respiration University Biology Volume 3 Openstax University Biology Volume 3 Pdf University Biology Volume 4 Pdf Ur Revision Guide IGCSE Biology What Are Gametes What Are Gametes in Biology What Are Gametes in Plants What Are Gametes in Punnett Squares What Are Gametes Quizlet What Are the Types of Gametes Working of Excretory System Www.Biology Form One Notes.com Www.Biology From One KLB.com Www.form 1 Biology.com Www.form 2 Biology.com Www.form 3 Biology.com Www.form 4 Biology.com Www.form Four Biology.com Www.form One Biology.com Www.form Three Biology.com Www.form Two Biology.com Www.kusoma Notes Www.kusoma Revision Materials Www.kusoma.co.ke Biology Notes Xtremepapers IGCSE Biology Year 11 Biology Z Notes Biology IGCSE Znotes as Biology 15 Common Biology Questions From Form 1 15 Common Biology Questions From Form 2 15 Common Biology Questions From Form 3 15 Common Biology Questions From Form 4 15 Common Biology Questions From Form Four 15 Common Biology Questions From Form One 15 Common Biology Questions From Form Three 15 Common Biology Questions From Form Two 150 Common Biology Questions From Form 1 150 Common Biology Questions From Form 2 150 Common Biology Questions From Form 3 150 Common Biology Questions From Form 4 150 Common Biology Questions From Form Four 150 Common Biology Questions From Form One 150 Common Biology Questions From Form Three 150 Common Biology Questions From Form Two 2019 KCSE Exams Biology Papers 2019 KCSE Exams Papers 2020 KCSE Exams Biology Papers 2021 KCSE Exams Biology Papers Best Biology Books for KCSE Knec Biology Biology 2 Topic Form Two Biology Diagrams Biology Form 1 and 2 Notes Biology Form 1 Download Biology Form 1 Notes Online Biology Form 1 Notes Revision Biology Form 1 Pastpapers and Marking Scheme Biology Form 1 Questions and Answers Pdf Biology Form 1 Revision Notes Biology Form 1 Text Book Biology Form 1 Text Book Notes Biology Form 2 Download Biology Form 2 Notes Biology Form 2 Notes Online Biology Form 2 Notes Revision Biology Form 2 Pastpapers and Marking Scheme Biology Form 2 Pdf Biology Form 2 Questions and Answers Pdf Biology Form 2 Revision Notes Biology Form 2 Text Book Biology Form 2 Text Book Notes Biology Form 3 Download Biology Form 3 Notes Online Biology Form 3 Notes Revision Biology Form 3 Pastpapers and Marking Scheme Biology Form 3 Questions and Answers Pdf Biology Form 3 Revision Notes Biology Form 3 Text Book Biology Form 3 Text Book Notes Biology Form 4 Download Biology Form 4 Notes Online Biology Form 4 Notes Revision Biology Form 4 Pastpapers and Marking Scheme Biology Form 4 Questions and Answers Pdf Biology Form 4 Revision Notes Biology Form 4 Text Book Biology Form 4 Text Book Notes Biology Form Four Download Biology Form Four Notes Online Biology Form Four Notes Revision Biology Form Four Pastpapers and Marking Scheme Biology Form Four Questions and Answers Pdf Biology Form Four Revision Notes Biology Form Four Text Book Biology Form Four Text Book Notes Biology Form One Download Biology Form One Notes Online Biology Form One Notes Revision Biology Form One Pastpapers and Marking Scheme Biology Form One Questions and Answers Biology Form One Questions and Answers Pdf Biology Form One Revision Notes Biology Form One Text Book Biology Form One Text Book Notes Biology Form Three Download Biology Form Three Notes Online Biology Form Three Notes Revision Biology Form Three Pastpapers and Marking Scheme Biology Form Three Questions and Answers Pdf Biology Form Three Revision Notes Biology Form Three Text Book Biology Form Three Text Book Notes Biology Form Two Download Biology Form Two Notes Online Biology Form Two Notes Revision Biology Form Two Pastpapers and Marking Scheme Biology Form Two Questions and Answers Pdf Biology Form Two Revision Notes Biology Form Two Text Book Biology Form Two Text Book Notes Biology Full Exam Papers Biology K.C.S.E Revision Papers Biology KCSE Revision Biology Notes Book Four Biology Notes Book One Biology Notes Book Three Biology Notes Book Two Biology Notes Form 2 Biology Questions and Answers for High Schools Pdf Biology Questions and Answers Form 1 Biology Questions and Answers Form 2 Biology Questions and Answers Form 3 Biology Short Note for Revising Form 1 Biology Short Note for Revising Form 2 Biology Short Note for Revising Form 3 Biology Short Note for Revising Form 4 Biology Short Note for Revising Form Four Biology Short Note for Revising Form One Biology Short Note for Revising Form Three Biology Short Note for Revising Form Two Biology Short Notes Form 1 Biology Short Notes Form 2 Biology Short Notes Form 3 Biology Short Notes Form 4 Biology Short Notes Form Four Biology Short Notes Form One Biology Short Notes Form Three Biology Short Notes Form Two Biologyy Form 2 Questions and Answers Pdf Brief Notes Biology Form 1 Brief Notes Biology Form 2 Brief Notes Biology Form 3 Brief Notes Biology Form 4 Brief Notes Biology Form Four Brief Notes Biology Form One Brief Notes Biology Form Three Brief Notes Biology Form Two Brief Notes Biology Form3 Chapter1 Download Book 1 Biology Notes Download Book 2 Biology Notes Download Book 3 Biology Notes Download Book 4 Biology Notes Download Book Four Biology Notes Download Book One Biology Notes Download Book Three Biology Notes Download Book Two Biology Notes Download Book1 Biology Notes Download Book2 Biology Notes Download Book3 Biology Notes Download Book4 Biology Notes Download KCSE Biology Study Notes Download Secondary Subjects Download Secondary Subjects in Kenya Download Secondary Subjects KCSE Exams Revision Kenya Exams Revision Kenya KCSE Expected Questions and Answers in Biology Form One Form 2 Biology Notes Form 2 Biology Notes Pdf Form 2 Biology Topics Form 3 Biology Book Pdf Form Iii Topics of Biology Revisios How to Answer Biology Paper 1 Questions? How to Answer Biology Paper 2 Questions? How to Answer Biology Paper 3 Questions? How to Answer KCSE Biology Paper 1 Questions? How to Answer KCSE Biology Paper 2 Questions? How to Answer KCSE Biology Paper 3 Questions? How to Answer Paper 1 Biology Questions? How to Answer Paper 2 Biology Questions? How to Answer Paper 3 Biology Questions? K.C.S.E Revision Papers K.C.S.E Revision Papers Biology KCSE Biology Essay Questions and Answers Pdf KCSE Biology Revisions KCSE Biology Study Notes KCSE Free Biology Qussions KCSE Free Qussions KCSE Revision Kenya KCSE Revisions Biology Form Two Questions Revision Kenya Revision Kenya Kcsse Sammary Note for Biology Form 1 Sammary Note for Biology Form 2 Sammary Note for Biology Form 3 Sammary Note for Biology Form 4 Sammary Note for Biology Form Four Sammary Note for Biology Form One Sammary Note for Biology Form Three Sammary Note for Biology Form Two Www.last Year KCSE Exams.com Biology Past Papers and Marking Scheme Igcse Biology Past Papers Igcse Biology Past Papers 2015 Igcse Biology Past Papers by Topic Edexcel Igcse Biology Past Papers Biology Questions Book Two Biology Form One Biology Form 2 Notes Pdf Biology Form 3 Notes Biology Form 3 Notes Pdf - Fill Online, Printable ... Biology Form 3 Notes Pdf - Fill Online, Printable, Fillable, Blank | Pdffiller Biology Form 3 Notes Pdf Download Biology Form Three Full Notes Download Your Document Biology Notes Form 3 Classification Biology Notes Form 4 Pdf Biology Questions and Answers Form 3 - High School Biology Tests Form 3 Biology Book Pdf Form 3 Biology Notes Form 3 History Notes Pdf Download Form 3 Notes Pdf - Fill Online, Printable Form 3 Notes Pdf - Fill Online, Printable, Fillable, Blank | Pdffiller Kenya Form 3 Biology Notes Klb Biology Book 3 Pdf Download Klb Biology Form 3 Notes Pdf A Level Biology Questions and Answers Pdf All Biology Questions and Answers Pdf,ppt Biology Exam Questions and Answers Pdf Biology Multiple Choice Questions and Answers Pdf Biology Questions and Answers for High Schools Pdf Cell Biology Questions and Answers Multiple Choice Pdf Cell Biology Questions and Answers Pdf Biology Notes Form 1-4 Pdf Free High School Notes Kenya Free Kcse Revision Notes General Biology Test Questions and Answers Pdf High School Biology Multiple Choice Questions and Answers Pdf Kcse Biology Revision Notes Pdf Kcse Revision Books Pdf Kcse Revision Notes Pdf Kenya Secondary School Notes Pdf Notes of Form 123 and 4 All Subject Biology Notes Form 1 Free Download Advice to KCSE Candidates Best Revision Books for KCSE How to Pass an Exam Successfully How to Pass KCSE 2018 How to Pass KCSE 2019 How to Pass KCSE Biology Paper How to Pass KCSE Biology How to Pass KCSE Biology How to Pass KCSE 2019 K.c.s.e Biology Paper 1 2017 KCSE 2019 Prediction KCSE Prediction 2019 KCSE Revision Tips KCSE Biology Paper 1 2018 KCSE Biology Paper 2 2018 KCSE Biology Past Papers Pdf KCSE Past Papers 2012 KCSE Past Papers 2017 Pdf KCSE Past Papers 2018 KCSE Past Papers of Biology Pp2 KCSE Biology Past Papers Pdf Answers for K.c.s.e Past Papers for Biology Biology Paper 1 With Answers Biology Paper 2 Questions and Answers Biology Paper One Questions and Answers Kcse Biology Essay Questions and Answers Pdf Kcse Biology Paper 1 2017 Kcse Biology Paper 1 2018 Kcse Biology Paper 3 Past Papers Kcse Past Papers 2015 Marking Schemes Biology KCSE Papers With Their Marking Schemes Biology Paper 1 and Answers KCSE 2017 Papers and Marking Scheme KCSE 2019 Papers and Marking Scheme KCSE Biology Paper 1 2018 KCSE Biology Paper 1 2019 KCSE Biology Paper 1 2019 Past Papers KCSE Biology Paper 2 2017 KCSE Biology Paper 2 2018 KCSE Biology Paper 2 2019 KCSE Biology Paper 2 2019 Past Papers KCSE Biology Paper 3 2019 Past Papers KCSE Biology Past Papers and Answers KCSE Marking Schemes Pdf KCSE Past Papers 2015 Marking Schemes KCSE Past Papers 2019 Marking Schemes KCSE Past Papers Biology Paper 1 2019 KCSE Past Papers Biology Paper 2 2019 KCSE Past Papers Biology Paper 3 2019 Past Papers KCSE Biology Paper 1 2019 Past Papers KCSE Biology Paper 2 2019 Past Papers KCSE Biology Paper 3 2019 9th Grade Biology Notes All Biology Essays Pdf Ap Bio Chapter 1 Notes Ap Biology Chapter 3 Summary Bio Chapter 4 Bio F4 C2 Biology 9 Biology Chapter 2 Biology Chapter 2 Notes Biology Chapter 3 Biology Chapter 4 Notes Biology Chapter 5 Biology Class 9 Chapter 2 Notes Biology Class 9 Notes Pdf Download Biology Essay Questions and Answers Form 4 Pdf Biology Essays and Answers Pdf Biology Essays Kcse Biology Essays Notes Biology Essays Pdf Download Biology Form 4 Notes Pdf Download Biology Form 4 Paper 2 Questions and Answers Biology Form 4 Questions and Answers Biology Form 4 Topics Biology Movement of Substances Biology Notes for Class 9 Pdf Biology Notes Form 1-4 Biology Notes Form 1-4 Pdf Biology Notes Form 2 Biology Notes Form 4 Pdf Biology Questions and Answers for High Schools Pdf Biology Questions and Answers Form 1 Chapter 2 the Chemical Context of Life Answers Chapter 2 the Chemical Context of Life Campbell Biology Chapter 2 the Chemical Context of Life Focus Questions Chapter 2 the Chemical Context of Life Multiple Choice Chapter 2 the Chemical Context of Life Powerpoint Chapter 4 Cells and Tissues Answer Key Class 9th Biology Notes Download Biology Notes Form Four Notes Free Biology Notes Kcse Biology Essay Questions and Answers Pdf Kcse Biology Essays Pdf Kcse Biology Notes Pdf Klb Biology Form 4 Notes Pdf Mastering Biology Chapter 2 the Chemical Context of Life Notes of Biology Section 2.1 Cell Structure and Function Answer Key State the Level of Cell Organisation of Amoeba Sp Biology Form 1 Questions and Answers Pdf Biology Kcse Revision Questions and Answers Biology Paper 2 Questions and Answers Biology Paper One Questions and Answers Biology Questions and Answers Form 1 Biology Questions and Answers Form 3 Form 2 Biology Questions and Answers Kcse Biology Essay Questions and Answers Pdf Kcse Biology Past Papers and Answers All Biology Questions and Answers Pdf,ppt Biology Exam Questions and Answers Pdf Biology Question Paper 2015 With Answer Biology Questions and Answers for High Schools Pdf Gs 2015 Biology Answer Key Tifr 2017 Biology Answer Key Tifr Gs 2011 Biology Answer Key Tifr Gs 2012 Biology Answer Key Tifr Previous Year Question Papers of Biology With Answers Biology Form 1 Questions and Answers Biology Paper 1 2018 Biology Paper 2 2018 Biology Paper 1 2019 Biology Paper 2 2019 Biology Paper 1 Notes Biology Paper 1 Questions and Answers Pdf Biology Paper 2 Questions and Answers Biology Questions and Answers Form 2 KCSE Biology Paper 1 2018 KCSE Biology Paper 2 2018 KCSE Biology Paper 1 2017 KCSE Biology Paper 2 2017 KCSE Biology Paper 1 2019 KCSE Biology Paper 2 2019 Most Tested KCSE Biology Questions Biology Form 2 Notes Pdf Download Biology Form 2 Pdf Biology Form 2 Syllabus KLB Notes Biology Form Two Topics Biology Notes Form 3 Biology Form 2 Questions and Answers Pdf Form 2 Biology Questions and Answers KLB Biology Form 2 Book Pdf KLB Biology Form 2 Notes Pdf 4m1 Notes Viusasa 4m2 Notes Viusasa 4m3 Notes Viusasa 4m4 Notes Viusasa Download on Viusasa - Download Now for Free Elimu - Viusasa Elimu Library | Notes, Exams, Lesson Plans, Schemes Elimu Online High School Notes - Revision Materials for Kenyan Schools Https //www.viusasa.com/elimu Kenya Notes Viusasa Elimu Form 1 Notes Viusasa Elimu Form 2 Notes Viusasa Elimu Form 3 Notes Viusasa Elimu Form 4 Notes Viusasa Elimu Form Four Notes Viusasa Elimu Form One Notes Viusasa Elimu Form Three Notes Viusasa Elimu Form Two Viusasa Viusasa Education Viusasa Elimu Viusasa Elimu Class 6 Viusasa Elimu Form 1 Viusasa Elimu Form 1 Notes Viusasa Elimu Form 2 Viusasa Elimu Form 2 Notes Viusasa Elimu Form 3 Viusasa Elimu Form 3 Notes Viusasa Elimu Form 4 Viusasa Elimu Form 4 Notes Viusasa Elimu Form Four Viusasa Elimu Form Four Notes Viusasa Elimu Form One Viusasa Elimu Form One Notes Viusasa Elimu Form Three Viusasa Elimu Form Three Notes Viusasa Elimu Form Two Viusasa Elimu Form Two Notes Viusasa High School Notes - Revision Materials for Kenyan Schools Viusasa Notes Biology Questions and Answers Form 2 - Biology Form Two Notes Biology Questions and Answers Form 4 - Biology Form Four Notes Biology Questions and Answers Form 3 - Biology Form Three Notes Biology Questions and Answers Form 1 - Biology Form One Notes Biology Mock Papers Biology Paper 1 2019 Biology Paper 1 Notes Biology Paper 1 Questions and Answers Biology Paper 1 Questions and Answers Pdf Biology Paper 2 Form 3 Biology Paper 2 Notes Biology Paper 2 Questions and Answers Pdf Biology Past Papers Biology Past Papers Pdf Biology Questions and Answers Pdf Biology Revision Questions and Answers Pdf Biology Revision Questions Pdf Common Exam Questions in Biology Paper 1 Common Exam Questions in Biology Paper 2 Common Test Questions in Biology Paper 1 Common Tested Questions in Biology Paper 1 Commonly Tested Questions in Biology Paper 1 K.c.s.e.Biology Questions and Answers KCSE 2019 Biology Paper 1 Marking Scheme KCSE 2019 Biology Paper 2 KCSE 2019 Biology Paper 2 Marking Scheme KCSE 2020 Prediction Questions and Answers KCSE Biology Paper 1 2019 KCSE Biology Paper 2 2016 KCSE Biology Paper 2 2017 KCSE Biology Paper 2 2018 KCSE Biology Paper 2 2019 KCSE Biology Questions and Answers Most Tested Questions in Biology Paper 1 Most Tested Questions in Biology Paper 2 Mostly Tested Questions in Biology Paper 1 Mostly Tested Questions in Biology Paper 2 Biology Form 4 Biology Revision Questions Form 1 Combined Science Notes Form 1 Form 4 Notes High Flyer Series Biology Form 1-4 Kcse Past Papers Biology With Answers Biology Notes Download Secondary Biology Notes Pdf Water and Hydrogen Form 1 Notes High Flyer Series KCSE Revision in Biology High Flyer Series KCSE Revision Biology Form 1-4 Revised A Level Biology Notes Uganda Pdf Download Buddo Junior School Holiday Work Biology Notes for a Level Pdf Biology Notes Form 1 Biology Notes Form 3 the Mole Biology Notes Form 4 Biology Notes O Level Biology Notes O Level Uganda Biology Notes O Level Uganda Pdf Biology Notes Pdf Download Biology Notes Form 3 Biology Notes Form 3 Biology Questions and Answers Form Three Biology Syllabus Pdf Gayaza High School Biology Notes Gayaza High School Biology Notes Pdf Gayaza High School Biology Past Papers Gayaza High School Biology Past Papers Answers Gayaza High School Biology Past Papers Questions and Answers Gayaza High School E Learning Gayaza High School Elearning Platform Gayaza High School Examinations Gayaza High School Holiday Work Gayaza High School Notes Gayaza High School Notes 2021 Gayaza High School Notes 2022 Gayaza High School Notes 2025 Gayaza High School Notes 2026 Gayaza High School Notes Pdf Gayaza Junior School E Learning Platform Gayaza Junior School Holiday Work Gayaza O Level Biology Notes Home › Gayaza High School | Elearning Platform Kabojja Junior School Holiday Work Pdf Klb Biology Book 3 Klb Biology Form 3 Teachers Guide Klb Biology Notes List of Ugandan E-learning Platforms for Students Mirembe Junior School Holiday Work Ntare School Past Papers O Level Biology Notes Free Download O Level Biology Notes in Uganda O Level Biology Notes Pdf O Level Biology Notes Uganda Pdf O Level Biology Notes Uganda Pdf Download O Level General - Home › Gayaza High School | Elearning S.1 Biology Notes | Standard High School Zzana S.3 Biology Notes S.4 Biology 2 Notes | Standard High School Zzana Seeta High School Elearning Seeta High School Holiday Work Seeta High School Notes Seeta High School Notes Pdf Seeta High School Past Papers Seeta High School Past Papers Pdf Senior 1 Biology Notes Senior 1 Biology Notes in Uganda Senior 1 Biology Notes Uganda Senior 1 Biology Questions Senior 1 Exams Senior 1 Work Senior 1 Work 2020 Senior 1 Work 2020 Uganda Senior 2 Biology Notes Senior 2 Biology Notes in Uganda Senior 2 Biology Notes Uganda Senior 2 Biology Questions Senior 2 Exams Senior 2 Work Senior 2 Work 2020 Senior 2 Work 2020 Uganda Senior 3 Biology Notes Senior 3 Biology Notes in Uganda Senior 3 Biology Notes Uganda Senior 3 Biology Questions Senior 3 Exams Senior 3 Work Senior 3 Work 2020 Senior 3 Work 2020 Uganda Senior 4 Biology Notes Senior 4 Biology Notes in Uganda Senior 4 Biology Notes Uganda Senior 4 Biology Questions Senior 4 Exams Senior 4 Work Senior 4 Work 2020 Senior 4 Work 2020 Uganda Senior Four Biology Notes Senior Four Biology Notes in Uganda Senior Four Biology Notes Uganda Senior Four Biology Questions Senior Four Exams Senior Four Work Senior Four Work 2020 Senior Four Work 2020 Uganda Senior One Biology Notes Senior One Biology Notes in Uganda Senior One Biology Notes Uganda Senior One Biology Questions Senior One Exams Senior One Work Senior One Work 2020 Senior One Work 2020 Uganda Senior Three Biology Notes Senior Three Biology Notes in Uganda Senior Three Biology Notes Uganda Senior Three Biology Questions Senior Three Exams Senior Three Work Senior Three Work 2020 Senior Three Work 2020 Uganda Senior Two Biology Notes Senior Two Biology Notes in Uganda Senior Two Biology Notes Pdf Senior Two Biology Notes Uganda Senior Two Biology Questions Senior Two Exams Senior Two Work Senior Two Work 2020 Senior Two Work 2020 Uganda St Mary's Kitende E Learning Standard High School Notes Standard High School Zana a Level Notes Standard High School Zana Com Notes Standard High School Zana E Learning Standard High School Zana E Learning Platform Standard High School Zana E-learning Platform Standard High School Zana Notes for Senior Two Standard High School Zana Notes Pdf Standard High School Zana Website Standard High Zana Notes Uace Biology Notes Uace Biology Notes Pdf Uce Biology Notes Pdf Uce Biology Notes Pdf Download Uce Past Papers Uganda Secondary Schools E-learning Platform Uneb Marking Guides Pdf Uneb Past Papers and Answers Pdf Biology Form 3 Notes on Ecology Biology Form 3 Questions and Answers Pdf Biology Notes Form 3 Classification Biology Notes Form 3 Growth and Development Biology Notes Form 3 Pdf Free Download Ecology Notes Ecology Revision Questions and Notes Form 3 Biology Notes on Reproduction Klb Biology Form 3 Notes Pdf Download Before You Start Writing the Exam | Kcpe-kcse Kcse 2019 Biology Paper 1 Questions and Answers Kcse 2020 Biology Paper 1 Questions and Answers Kcse 2020 Leakage Biology Questions Kcse 2020 Prediction Questions and Answers Kcse 2021 Biology Paper 1 Questions and Answers Kcse 2021 Leakage Biology Questions Kcse 2021 Prediction Questions and Answers Kcse 2022 Biology Paper 1 Questions and Answers Kcse 2025 Biology Paper 1 Questions and Answers Kcse 2025 Biology Paper 1 Questions and Answers Kcse 2025 Leakage Biology Questions Kcse 2026 Leakage Biology Questions Kcse 2025 Prediction Questions and Answers Kcse 2026 Prediction Questions and Answers Kcse 2025 Prediction Questions and Answers Kcse Biology Essay Questions and Answers Pdf Kcse Biology Past Papers and Answers Kcse Past Papers and Answers Biology Kcse Past Papers Kcse Prediction Questions Tips to Passing Kcse Examinations » Kcse Revision What to Watch Out for When Answering Questions in Kcse Which Questions Always Must Appear on Kcse Paper? Which Questions Always Must Appear on Kcse Papers? Biology Form 1 Questions and Answers Pdf Download Biology Notes Form 1-4 Biology Form 1 Questions and Answers Pdf Form 1 Biology Topical Questions Form 1 Biology Exam Paper With Answer Pdf Form 1 Exams 2020 Form 1 Biology Past Papers Form 1 Biology Revision Papers With Answers Sample Biology Test for Form One Exams Ntare School Past Papers Seeta High School Notes Pdf Seeta High School Past Papers Seeta High School Past Papers Pdf St Mary's Kitende Past Papers Uce Biology Notes Pdf Uce Past Papers Uneb Marking Guides Pdf Uneb Past Papers and Answers Pdf Biology Book 3 Download Biology Form 3 Questions and Answers Biology Form 3 Syllabus Biology Form 3 Topics Biology Notes Form 3 Biology Notes Form 3 Coordination Biology Notes Form 3 Reproduction Biology Notes Form Three Biology Notes Pdf Download Form 3 Biology Exam Form 3 Biology Notes on Reproduction Pdf Revision Biology Revision a Level Biology Revision Notes - Biology S.1-biology-notes S.1-biology-notes Uganda S.2-biology-notes S.2-biology-notes Uganda S.3-biology-notes S.3-biology-notes Uganda S.4-biology-notes S.4-biology-notes Uganda S.5-biology-notes S.5-biology-notes Uganda S.6-biology-notes S.6-biology-notes Uganda S1 Biology Notes Term 1 S1 Biology Notes Term 2 S1 Biology Notes Term 3 S2 Biology Notes Term 1 S2 Biology Notes Term 2 S2 Biology Notes Term 3 S3 Biology Notes Term 1 S3 Biology Notes Term 2 S3 Biology Notes Term 3 S4 Biology Notes Term 1 S4 Biology Notes Term 2 S4 Biology Notes Term 3 Senior 3 Biology Notes Senior 3 Biology Notes Uganda Senior Three Biology Notes Senior Three Biology Notes Uganda Biology Form 1 the Cell Biology Form One Notes Free – Education News Biology Notes Form 1-4 Biology Questions and Answers Form 1 - Biology Form One Biology Questions and Answers Form 2 - Biology Form Two Biology Questions and Answers Form 3 - Biology Form Three Biology Questions and Answers Form 4 - Biology Form Four Biology Questions and Answers Senior 1 - Biology Senior One Biology Questions and Answers Senior 2 - Biology Senior Two Biology Questions and Answers Senior 3 - Biology Senior Three Biology Questions and Answers Senior 4 - Biology Senior Four Biology Topic by Topic Questions and Answers Combined Science Notes Form 1 Form 1 Biology Revision Questions and Answers Form 1 Biology Topical Questions Form 1 Revision Papers With Answers Form 2 Biology Revision Questions and Answers Form 3 Biology Revision Questions and Answers Form Four Biology Revision Questions and Answers Form One Biology Revision Questions and Answers Form Three Biology Revision Questions and Answers Form Two Biology Revision Questions and Answers Free Biology Form 1 Notes Free Biology Notes Introduction to Biology Form One Kcse Past Papers: Biology Form 1 Kcse Past Papers: Biology Form 1 Topical Questions Kcse Past Papers: Biology Form 1 Topical Questions and Answers Most Tested Areas in Biology Kcse Most Tested Areas in Biology Kcse Exams Most Tested Areas in Biology Uneb Most Tested Areas in Form 1 in Biology Most Tested Areas in Form 2 in Biology Most Tested Areas in Form 3 in Biology Most Tested Areas in Form 4 in Biology Most Tested Areas in Form Four in Biology Most Tested Areas in Form One in Biology Most Tested Areas in Form Three in Biology Most Tested Areas in Form Two in Biology Most Tested Areas in Kcse Biology Most Tested Areas in Kcse Biology Exams Most Tested Areas in Senior 1 in Biology Most Tested Areas in Senior 2 in Biology Most Tested Areas in Senior 3 in Biology Most Tested Areas in Senior 4 in Biology Most Tested Areas in Senior Four in Biology Most Tested Areas in Senior One in Biology Most Tested Areas in Senior Three in Biology Most Tested Areas in Senior Two in Biology Most Tested Areas in Uneb Biology Revision Notes Biology Form 1 - Free Kcse Past Papers Who Was Biology Champion KCSE 2019 Top 100 Students in Biology KCSE 2019 Best 100 Students in Biology KCSE 2019 Top Student in Biology KCSE Best Student in Biology KCSE Who Was Biology Champion KCSE 2020 Top 100 Students in Biology KCSE 2020 Best 100 Students in Biology KCSE 2020 Names of Best Biology Students KCSE Names of Top Biology Students KCSE Scheme of work for IGCSC Biology Form 3 to 4 for Botswana Biology Questions on Human Diseases Form Three Biology Form 3 Notes Kcse Made Familiar Biology Pdf Download Find Kcse Made Familiar Biology Pdf Download Find Kcse Made Familiar Biology Pdf Download Here! Summary of Biology Form 1 Popular Questions in Biology Form 2 Kcse Revision Biology Paper Form One Biology Questions and Answers A Level Biology Revision Notes Pdf Biology Questions and Answers Form 3 Biology Paper 1 Questions and Answers Pdf Biology Form Two Notes Pdf Download

    • Scholarship 2025/26

    Current Scholarships 2025/2026 - Fully Funded

    Full Undergraduate Scholarships 2025 - 2026

    Fully Funded Masters Scholarships 2025 - 26

    PhD Scholarships for International Students - Fully Funded!


    Funding Opportunities for Journalists 2025/2026


    Funding for NGOs 2025/2026


    Funding for Artists 2025/2026


    Funding for Entrepreneurs 2025/2026

  • ✅Over 4500 Current Fully Funded Scholarships for International Students 2025
  • ✅ Undergraduate Scholarships 2025
  • ✅ Masters Scholarships 2025
  • ✅ PhD Scholarships 2025 Click Here!
    _
  • Jobs in Kenya
  • Jobs in Uganda
  • Jobs in Ethiopia
  • Jobs in Nigeria
  • Jobs in South Sudan
  • Jobs in South Africa
  • Jobs in Rwanda
  • Jobs in Zambia
  • Jobs in Malawi
  • Jobs in Ghana
  • Jobs in Tanzania

    ***