4.3.1 Biology Paper 1 (231/1)
1 (a) What is meant by the term wilting? (1 mark)
(b) Explain how an increase in temperature affects the rate of active transport.
2 The diagram below represents a cell as seen under an electron microscope.
(b) Give two reasons for your answer in 2(a) above. (2 marks)
(c) Why is the palisade layer a tissue? (1 mark)
(3)(a) State two external features found in the class Mammalia only. (2 marks)
(b) Name the taxonomic unit that comes immediately after a phylum in classiﬁcation. (1 mark)
(4)(a) State two roles of mucus in the stomach. ' (2 marks)
(b) Explain how age determines a person’s energy requirements. (2 marks)
(5)(a)Describe how turgor pressure builds up. (3 marks)
(6)Using a microscope, a student counted S5 cells a cross a ﬁeld of view whose diameter was 6000;4m. Calculate the average length of the cells. Show your working. (2 marks)
(7) Explain how the following forces contribute to the movement of water up the xylem vessels: (2 marks)
(8) Construct a step in a dichotomous key using two leaves one with a serrated and the other with a smooth margin. (2 marks)
(9) State one way in which each of the following is structurally adapted to its function:
(a) neurone; (2 marks)
(b) mitochondrion. (2 marks)
(10) How are lenticels adapted for gaseous exchange? (2 marks)
(11)State the advantage of possessing blood group AB. (1 mark)
(12)(a) A student collected an organism and observed the following features: simple eyes.
(b)four pairs of legs and two body parts.
(13) State the class to which the organism belongs. (1 mark)
(14) Give an example of an organism in this class. (1 mark)
(15) Name the kingdom to which plasmodium belongs. (1 mark)
(16)State two characteristics of living organisms that are speciﬁc to plants. (2 marks)
(17)Name the three end products of anaerobic respiration in plants. (3 marks)
(18)State two reasons why accumulation of lactic acid leads to an increase in heart beat. (2 marks)
(19)Name three mechanisms that ensure cross pollination takes place in ﬂowering plants. (3 marks)
(20)Name the ﬂower part that produces gametes. (1 mark)
(21)(a)How is the human sperm cell structurally specialised? (2 marks)
(b)State three factors in seeds that cause dormancy. (3 marks)
(21)Explain the theory of evolution by natural selection. (2 marks)
(a) Explain the role of continental drift in evolution. (3 marks)
(b) What is meant by the term organic evolution? (1 mark)
(22)The diagram below illustrates a response by a certain plant.
(b)Explain how the response illustrated above occurs.
23 The diagram below illustrates a defect in the eye.
24 Explain three protective functions of mammalian blood.
25 State one adaptation of xylem vessels to their function.
26 (a)What is meant by the term sex linked genes?
(b) Name two sex linked traits in human beings.
27(a) State two differences between complete and incomplete metamorphosis.
(b)State the importance of moulting to an insect
28(a) State two features of a ball and socket joint.
(b) Name the bone that allows the head to:
(i) nod; .............. ..
(ii) turn side ways
29 State two functions of pelvic girdle in mammals.
30 State two ways in which osmosis is signiﬁcant to plants.
Biology Paper 2 (231/2)
SECTION A (40 marks)
Answer all the questions in this section in the spaces provided
1 (a) The diagram below represents a plant in the division Bryophyta.
B ............................................................................................................................. .. D .................................................................. ..
(ii) State one function for each of the parts labelled A and C. (2 marks)
A ..................................................................................... ..
C ............................................................................................................................. ..
(b) The diagram below represents a member of the kingdom Animalia.
(ii) Using observable features in the diagram, give three reasons for the answer in b(i). V (3 marks)
2.The diagram below represents the human ear.
E .......................... ..
F .......................... ..
G .......................... ..
(b) How is each of the following adapted to its function?
(i) External auditory meatus;
(ii) Ear ossicles.
(c) Name one defect of the human ear.
3.(a) Explain the importance of the following in photosynthesis:
(ii) carbon(lV) oxide;
(b) Name one appropriate food substance for each of the following enzymes:
(i) ptylin ..... ..
(ii) pepsin ...... ..
(c) State the cause and two symptoms of Beri-beri.
Cause .................. ..
Symptoms (2 marks)
(i) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. (ii) ................................................................................................................................. ..
4.ln an investigation, a variety of pea plants grown from seeds with smooth coats were crossed with plants grown from seeds with wrinkled coats. All the seeds obtained in the ﬁrst ﬁlial (F I) generation had smooth seed coats.
(a) Using the letter R to represent the gene for smooth seed coat, ‘work out the genotype of the Fl generation. Show your working. (3 marks)
(b) l f the Fl generation was selfed, detennine the phenotypic ratio of the second ﬁlial (F2) generation. Show your working. (3 marks)
(c) If the total number of seeds in the F2 generation was 14 640, calculate the number of seeds with wrinkled coats. Show your working. (2 marks)
5.The diagram below represents a mammalian pelvic girdle.
(i) H (2 marks)
(ii) J (2 marks)
(b) State the function of obturator foramen. ( l mark)
(c) (i) Name the bone that articulates with the pelvic girdle at acetabulum. (1 mark)
(ii) Name the type of joint formed by the acetabulum and the bone named in (c)(i) above. (I mark)
(d) Name the bone fonned by the fusion of caudal vertebrae in human beings. (l mark) 125
SECTION B (40 marks)
Answer question 6 (compulsory) and either question 7 or 8 in the spaces provided after question 8.
6.A scientist carried out an investigation to ﬁnd out the population growth of mice under laboratory conditions. Twenty young mice were placed in a cage. The results obtained from the investigation were as shown in the table below.
(b) Account for the changes in mice population between
(i) 0 to 2 months (2 marks)
(ii) 2 to 6 months (2 marks)
(m) 6 to I0 months (2 marks)
(iv) I0 to 12 months. (2 marks)
(c) (i) Between which two months was the population change greatest? (1 mark)
(ii) Calculate the rate of population change over the period in (c)(i) above. (2 marks)
(d) What change in population would be expected if the investigation was continued to the 19th month? (l mark)
(e) To obtain the observed results state two variables that were kept constant during the investigation. _
7(a) Describe the process of blood clotting in human beings.
(b) How are respiratory surfaces in mammals adapted to their functions?
ii Describe the role of the following organs in excretion and homeostasis.
(a) the liver
(b) the skin during hot environmental conditions.
Biology Paper 3 (231/3)
1.(a) The photograph below shows the inner surface of the upper leﬁ side of the rib cage.
(ii) Explain the role of the part labelled M in inhalation. (5 marks)
(b) The photograph below shows a mammalian vertebra.
(ii) Name and state one function of the part labelled T.
.................................................................................................................. .. (1 mark)
............................................................................................... .. (1 mark)
(iii) How are the parts labelled S and V adapted to their functions? (4 marks)
c) The actual width of the vertebra below in cm is shown by a section of the ruler in the photograph.
(ii) Calculate the magniﬁcation of this image. (2 marks)
(iii) Determine the actual length of the vetebra from point A to B. Show your working. (2 marks)
2You are provided with a food sample labelled solution C. Using the reagents provided, carry out tests to identify the food substances present in the sample.
2. Non- reducing sugars
Below are photographs showing some observebal features of leaves. (12 marks)
Using the features in the order given below, construct a dichotomous key that can be used to identify the specimens.
5.3 BIOLOGY (231)
53.1 Biology Paper 1 (231/1)
1 a)Is when the rate of water loss is more than the rate of absorption and the plant droops; l mark
b)The rate of active transport increases with increase intemperature up to the optimum temperature; 1 mark
Further increase in temperature slows down the rate of active transport until it stops because it denatures enzymes; _ 1 mark
2 a)Animal cell; 1 mark
b)Has cell membrane only/has no cell wall;
c) Consists of many similar cells performing the same function; l mark
3 a)Have mammary glands; have extemal ears/pinna;
Body covered with fur/hair; ' Max. 2 marks
b)Class; l mark
4 a)Lubrication; Protection; 2 marks
b)Young people are more active; requiring more energy;/
Older people are less active; requiring less energy; 2 marks
5 As the cell gains water by osmosis; the sap/cell vacuole enlarges; pushing the cytoplasm outwards; exerting pressure on the cell wall; Any 3 3 marks
7 Water molecules cling to each other maintaining a continuous column of water/preventing the break of water column;
8Water molecules cling to the sides of the xylem vessel walls; l mark
1(a) - Leaf with serrated margin -- go to 2;
(b) - Leaf with smooth margin -- go to --; 2 marks
9.a)Presence of myelin sheath for insulation/increases transmission; Axon for transmission of impulses;
Large cell body controls activites of cell; Nerve endings/dendrites receives impulses from receptors cells;
Node of Ranvier speeds up impulse transmission. b)Inner membrane highly folded/cristae to increase S A for attachment of (respiratory) enzymes.
10. Cells loosely arranged; to facilitate air circulation;
Cells have moist surfaces; to dissolve respiratory gases; 2 marks
11. Can receive blood from any donor/ universal recepient; l mark
12.a)(i) Arachnida; l mark
(ii) Spider/scorpion/tick/mite; l mark
13.Protoctista/protista; l mark
Autotrophic nutrition; show alternation of generation; Limited movement;
Limited excretory products/unspecialized respiratory structures; Localised growth; 2 marks
14 .Alcohol/ethanol; Carbon (IV) oxide; Energy/Adenosine Triphosphate; 3 marks 15 To increase supply of oxygen to the tissues;
The oxygen is used to oxidize lactic acid (to carbon (IV) oxide, water and energy);
16 . Protogyny; protandry; Dioecious; Dichogamy;
Self sterility/incompatibility; Heterostyly;
Presence of structures/substances to attract agents of pollination; Max. 3 marks 17 .Ovary /Anther; l mark
18Acrosome/Lysosome contain enzyme to digest membrane of the ovum;
- Numerous mitochondria to provide energy for movement;
- Long tail for faster movement; Max. 2 marks
19Embryo not fully developed;
- Chemical inhibitors/presence of abscisic acid;
- Hard/impermeable testa/seed coat;
- Low horrnones/low enzymes concentration; Max. 3 marks
20. Genetically acquired beneﬁcial characteristics which occur spontaneously; are perpetuated through reproduction; 2 marks
21. Continents existed as one large Landmass/Pangea/Laurasian and Gondwana Land;
Present continents drifted from it leading to isolation of organisms; organisms in each continent evolved along different lines hence emergence of new species; 3 marks
22. a)Emergence of new life/species/organisms from pre-existing simple forms, gradually over a long period of time, to present complex forms; 1 mark
b) Thigmotropism/haptotropism; l mark
Part of the tendril in contact with support causes migration of auxins to the opposite side;
leading to faster cell division/growth on the side not in contact with the support; This causes the tendril to curl around the support;
23.Use of biconcave/concave lens/divergent lens; to diverge the rays and make image be focussed on the retina; 2 marks
24.Contains antibodies that defend the body from foreign antigens;
- Has white blood cells that produce antibodies/while blood cells engulf antigens;
- Has platelets that initiate blood clotting to prevent excessive bleeding at an open wound prevent entry of pathogens;
25. Thin and long to allow for capillarity;
- Walls ligniﬁed to strengthen the stem/to prevent collapse of vessels;
- Have bordered pits to allow for exchange of materials;
Max. 2 marks
26. Genes inherited along with the sex chromosomes; l mark
Haemophilia; hairy ears/pinna/nose; colour blindness/red green; blue-green colour blindness;
Muscular diastrophy; baldness
27 . a)Complete metamorphosis - eggs hatch into larvae while in incomplete metamorphosis hatch
into nymphs which resemble the adult;
Complete metamorphosis has four stages; egg, larvae. pupa and adult while an incomplete metamorphosis has three stages; egg, nymph and adult. 2 marks
b)To allow for growth of the insect; l mark
28. a)Ligaments; synovial ﬂuid; synovial membrane; articular cartilage;
synovial capsule; a bone with rounded head ﬁtting into a cavity of another bone;
Max. 2 marks
b)(i) Atlas; (ii) Axis allows movement in all planes; 2 marks
29Form\joints with the legs to make walking possible; l mark
- Provide large surface area for attachment of muscles; l mark
- Offers support (to the body weight)
30Absorption of water; support;
Opening and closing of stomata;
Feeding in insectivorous/plants; 2 marks
Biology Paper 2 (231/2)
1.a)(i) B -Seta/stalk;
(ii) A- Production of spores/sporulation;
(ii) - Segmented body;
- Jointed appendages;
- Presence of exoskeleton
2 a)E Semi circular canals;
F Oval window/Fenestra ovalis/Fenestra vestibuli;
G Cochlea; 3 marks
b)(i) Lined with hair/secretion of wax/(has glands that secrete wax) to trap foreign bodies;
Hollow/tubular/tube; to direct sound waves to the ear drum/tympanum/tympanic membrane;
(max) (2 marks
(ii) Small/form a lever system/solid; to amplify (sound) vibrations; (2 marks) c) Deafness! absence of pinnal vertigo/tinnitus; (max) (1 mark
3.a) (i) Provides energy needed to split water molecules into oxygen and hydrogenl photolygis;
Provides energy for formation of ATP molecules (which is used in dark stage) (1 mark)
(ii) Combines with hydrogen ions to make glucose; (1 mark)
(iii) Used to trap light energy; (1 mark)
b) (i) Starch;
(ii) Protein; (2 marks)
c) (i) Lack of vitamin Bl/thiamine; (1 mark)
(ii) - Stunted growth;
- Paralysis of legs/arms/limbs/damage to peripheral nerves;
- Heart failure
- Swelling of feet/oedema
- Gastrointestinal disturbances/loss of appetite/sonstipation/diarrhoea/vomiting;
- Weight loss/muscle wasting
- Pale skin (2 marks)
4.(a) Parental phenotypes Smooth Wrinkled
(b) Parental genotypes
(i) Genotypic ratio
(ii) Phenotypic ratio 3 smooth coats 1 wrinkled coat;
(c) The total number of wrinkled seeds.
1/4 x 14,640 = 3660 ; (2 marks)
5.a)(i) H - It is long/wide/broad/ﬁat; to provide a large surface area for attachment of muscles;
- Has facets; for articulation with sacrum; (2 marks)
(ii) J Has ﬂexible cartilage; which allows for widening of the (female) pelvic girdle when giving birth/to absorb shock.
b)Allows passage of blood vesselslnervesl and muscles: (1 mark)
(i) Femur; 1 mark
(ii) Ball and socket; l mark
Coccyx; l mark
See graph on the next page. c) (i) No change in population/population is constant; mice still maturing/have not given birth; (2 marks)
(ii) Slow/gradual population growth; few mice have reached sexual maturity; (2 marks)
(iii) Faster/rapid rate of population growth/exponential;
Many mice sexually matured/reproducing/enough food/space/no competition/ birth rate higher than death/no diseases: (2 marks)
(iv) Population decline;
Competition is high / food is limiting / space is limiting/accumulation of toxic waste/disease (outbreak) deathrate higher than birth rate.
6.(i) 6 and 8 ; (l mark)
(ii) 310 - 115 = 195 mice per month;
Population would increase; (1 marks)
Food; space ; cage size; water;
(max) (2 marks)
7 .a) When a blood vessel is cut/injured platelets/thrombocytes/damaged tissue/wound is exposed to the air; they release thrombokinase/thromboplastin ; an enzyme that activates the conversion of prothrombin; to thrombin; in the presence of calcium ions;
vitamin Kl phylloquinone ; is needed for the formation of prothrombin;
Thrombin convens (soluble blood protein) ﬁbrinogen ; into (the ﬁbrous form) ﬁbrin;
which forms a mesh / network across the wound; The clot so formed prevents excessive bleeding; and entry of disease agents/pathogens/micro-organisms/microbes;
Max 10 marks
b)Many to provide a large surface area; across which large amounts of gases diffuse;
moist surfaces; to dissolve respiratory gases; so as to diffuse. Made of a thin membrane/epithelium/one cell thick wall ; to reduce diffusion distance;
Highly vascularized; to carry away oxygen; and bring in carbon (IV) oxide; creating a steep diffusion gradients. (10 marks)
8.Regulation of blood sugar ;
when blood sugar is below nomtal/90 mg/ 100 cm3 glucagon ;
triggers the conversion of glycogen to glucose in the liver ;
the glucose is released into the blood stream.
When blood sugar is in excess above normal/10 mg/100
causes the liver to convert glucose excess to glycogen ;
which is stored.
Production of heat energy ;
by increasing the rate of metabolic activities;
Excretion of bile pigments ;
produced due to breakdown of wom out red blood cells;
Deamination/removal of amino group of excess amino acids to form urea; and detoxication/poisonous/toxic substances;
(Max l0 marks)
b) Sweat glands excrete urea; excess water;
hence maintaining salt & water balance in the blood. Evaporation of sweat;
cools the body due to loss of latent heat of vaporization;
when the body temperature rises ;
blood vessels in the skin vasolidate;
allowing more blood to ﬂow near the skin surface;
thus heat is lost to the environment byfadiation/convection.
The erctor pili mucle relaxes hair ﬂattens ;
in a hot environment reducing insulation;
hence heat is lost from the body by radiationl convection; to the environment.
(max 10 marks)
Biology Paper 3 (231/3)
1 (i)Sternum; (1 mark)
(ii)The intemal intercostal muscles relax; pulling the ribs upwards; and outwards;
This increases the volume of the rib cage while pressure decreases;
Forcing air into the lungs;
b)(i)Anterior/dorsal view; (1 mark)
(ii)Name - Neural canal; (1 mark)
(iii)Function - Passage of the spinal cord. (l mark)
V: It is thick and solid; for bearing the weight of the body (back) (2 marks)
S: It is long; to provide a large surface area for attachment of muscles;
(i)image width = 9.8 cm;
(ii)Magniﬁcation = image length / width _
(iii)Actual lengthl width '
= 9.8:0.| 4.610.] Mg = >< 3 .12 ; Actual length AB - lO.4 1 0.] : 2.13 = 4 83$ cm ; (5 marks)
1 a)Simple leaves ................................go to 2;
b)Compound leaves .......................... .....go to 4;
2 a) Leaves net-veined/reticulate ................go to 3;
b)Leaves parallel veined .........................Commelinaceae;
3 a)Leaves with serrated margins ................ Malvaceae;
b)Leaves with smooth (entire) margins................Nystaginaceae;
4 a) Leaves opposite .............................. .go to 5;
b)Leaves pinnate ....................................Bignoniceae;
5 a)Leaves trifoliate ...............................Papilionaceae;
b)Leaves alternate ................................ .Compositae;
( 10 marks)
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 form 3 questions and answers biology form 3 questions and answers a level biology questions and answers biology form 1 questions and answers pdf biology form 2 questions and answers pdf funny biology questions and answers general biology test questions and answers kcse 2016 biology paper 1 11th ncert biology 12th class biology book free download 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 anaerobic respiration equation ap biology essay questions and answers as level biology notes biology 101 biology 12th biology 12th class notes pdf biology book 3 klb biology book 3 notes biology book for class 11 biology book pdf free download biology class 12 ncert solutions biology class 12 pdf 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 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 essays and answers biology essays kcse 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 questions and answers biology exam questions and answers pdf biology exam study guide biology excretion notes biology exercise form 4 with 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 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 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 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 syllabus biology form 4 textbook pdf biology form four notes pdf biology form four questions and answers 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 term three test biology form three questions and answers 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 form2 biology form2 textbook biology human reproduction video biology kcse 2017 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 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 2 biology notes form 3 biology notes form 4 biology notes form 4 chapter 2 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 notes biology paper 1 questions and answers biology paper 1 topics biology paper 2 questions and answers biology paper 2018 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 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 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 pdf 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 | revision science cell biology multiple choice questions and answers pdf cell biology multiple choice questions pdf cell biology question bank cell biology questions and answers multiple choice cell biology questions and answers multiple choice pdf cell biology questions and answers pdf cell biology short answer questions cell biology test bank questions cell questions and answers cell questions and answers 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 study guide college biology study guide pdf college biology test questions and answers complete biology for cambridge igcse revision guide pdf difficult questions on gaseous exchange in animals download form three biology notes download klb biology book 2 easy biology 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 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 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 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 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 revision gcse biology revision notes gcse biology revision notes pdf gcse biology revision notes pdf 9-1 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 3 questions good biology questions to ask hard biology quiz questions hard science questions and answers hard science questions to ask your teacher high school biology final exam pdf high school biology final exam questions 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 ial biology notes 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 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 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 made familiar chemistry kcse made familiar geography kcse made familiar kiswahili kcse made familiar mathematics pdf kcse mathematics paper 1 2016 kcse mock papers pdf kcse past papers kcse past papers 2012 kcse past papers 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 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.com past papers made familiar biology pdf made familiar mathematics mathematics form 3 questions and answers mathematics form 3 questions and answers pdf mcqs about gaseous exchange middle school science bowl biology questions more than 1800 biology questions and answers to help you study multiple choice questions on biology 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 practical biology experiments pdf practical biology question and answer pdf questions and answers on gaseous exchange questions based to introduction to biology 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 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 questions and answers for class 10 pdf simple scientific questions smart questions to ask a physics teacher smart questions to ask a science teacher snab biology revision notes the excretory system answer key the excretory system worksheet answers 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 znotes as biology