1.The scientist who introduced binomial nomenclature in the classification of organisms was

A. Charles Darwin

B. Carolus Linnaeus

C. John Ray

D. Louis Pasteur


2. Which of the following statements is true about arthropods?

A. Prothorax bears only legs

B. Mesothorax bears only legs

C. Metathorax bears only wings

D. Prothorax bears only wings


3. What level of organisation is Spirogyra?

A. System

B. Organ

C. Cell

D. Tissue


4. The streaming movement of cytoplasm within the Paramecium is known as

A. Transpiration

B. Digestion

C. Cyclosis

D. Osmosis


5. Which of the following organelles is found only in plant cells?

A. Mitochondria

B. Ribosomes

C. Lysosomes

D. Plastids


6. Active transport differs from diffusion in that active transport

A. is a very fast process

B. allows the movement of substances against concentration gradient

C. takes place in both light and dark reaction of photosynthesis

D. occurs in both plant and animal tissues


Use the diagram to answer question 7 and 8

The diagrams above are illustrations of an experimental set-up to demonstrate a type of tropic response in plants.




7. The type of response demonstrated is

A. phototropism

B. geotropism

C. hydrotropism

D. thigmotropism


8. The conclusion drawn from the experiment in the diagram above is that


A. shoots of plants are negatively thigmotropic

B. shoots of plants are negatively geotropic

C. shoots of plants are positively phototropic

D. roots of plants are positively hydrotropic


9. The odontoid process is found on the

A. axis vetebra

B. atlas vetebra

C. thoracic vetebra

D. sacral vetebra


10. A seedling was made to stand in a solution of red ink for three hours and a transverse section of the stem was examined under the microscope. The process being investigated was

A. the importance of micro elements to plants

B. ascent of water through the xylem

C. diffusion of colored substances

D. distribution of food in plants


11. Which of the following structures would carry out cellular respiration? A

A. germinating seed

B. decolorised leaf

C. dry leaf

D. boiled cowpea


12. Which of the following is NOT an excretory product of animals?

A. carbondioxide

B. urea

C. sweat

D. oxygen


13. An example of homeostasis in living organisms is

A. cooling effect resulting from evaporation of water from the body surface

B. root hairs of a plant growing towards the source of light

C. changing of the body colour of chameleon to match the colour of the foliage on which it is resting

D. the release of phosphorus into the phloem of a plant growing in a phosphorus-deficient soil


14. Ultrafiltration in the kidney takes place in the

A. Renal vein

B. Medulla

C. Loop of Henle

D. Bowman's Capsule


15. The thyroid gland is found at the base of the

A. Midbrain

B. Kidney

C. Neck

D. Liver


16. Which of the following statements about the response of neurones to stimulus is correct?

A. Neurons respond to stimulus of any strength

B. Neurons respond to all stimuli applied in rapid succession

C. Neurons respond more rapidly during the absolute refraction period

D. Intensity of stimulus must reach a threshold value before the neurons can be excited


17. Which of the following practices may lead to infection of the eye? Use of

A. contact lenses

B. convex lenses

C. biconcave lenses

D. concave lenses


18. The structures for gaseous exchange in breathing roots are

A. stomata

B. lenticels

C. cuticle

D. mitochondria



19. The diagram above is an illustration of the life cycle of an insect. The adult fly in this cycle is called

A. Housefly

B. Butterfly

C. Cockroach

D. Mosquito


20. In the diagram above, the larva is also known as

A. Nymph

B. Caterpillar

C. Maggot

D. Chrysalis


21. The source of energy required by plants during food production is

A. Photosynthesis

B. Chlorophyll

C. Sunlight

D. Microorganisms


22. One major difference between plant and animals nutrition is the ability of plants to synthesize

A. Food for plants and animals

B. Water for plants

C. Water for animals

D. Food for plants only


23. By what process is starch converted into maltose?

A. Hydrolysis

B. Condensation

C. Translocation

D. Photosynthesis


24. The ascent of water in tall trees is mainly due to


A. adhesive forces

B. transpiration pull

C. root pressure

D. cohesive forces


25. The duodenum of a person was surgically removed. Which of the following substances would have their digestion affected?

A. starch and protein only

B. starch and lipids

C. starch, peptones and maltose

D. starch, protein and lipids


26. Which of the following dental formulae represents the dentition in rabbits?

A. I 2/1 C 0/0 P 3/2 M 3/3

B. I 2/2 C 1/1 P 2/2 M 3/3

C. I 1/2 C 0/0  P 2/3 M 3/3

D. I 2/1 C 0/1 P 3/2  M3/3


27. The diagram above is an illustration of an experimental set-up to demonstrate a property of soil. The property of soil demonstrated is

A. particle size

B. capillarity

C. colour

D. texture


28. Which of the following statements would be a correct observation at the end of the experiment? Water moves

A. highest in sandy soil

B. lowest in loamy soil

C. to the same level in all soil types

D. highest in clayey soil


29. The most important factor(s) that influence(s) the ecological niche of an organism is/ are the

A. water, light and predator-prey relationship

B. food and water availability

C. physical environment

D. competition for food and space



30. The diagram above is an illustration of organisms in an air-tight aquarium. The most important factor needed by the organisms is

A. light energy

B. low humidity

C. oxygen

D. nitrate


31. Which of the following instruments is used to determine the turbidity of water?

A. hygrometer

B. hydrometer

C. secchi disc

D. rain gauge


32. In an ecosystem, the least efficient energy transfer link is from the

A. secondary consumers to decomposers

B. sun to producers

C. primary consumers to secondary consumers

D. producer to primary consumers


33. Xerophytes have the following characteristics aimed at conserving water except

A. thick cuticle

B. broad leaf surfaces

C. sunken stomata

D. waxy cuticle


34. An association between living organisms in which one lives on and feeds at the expense of the other is known as

A. commensalism

B. predation

C. parasitism

D. mutualism


35. When large numbers of organisms share limited space and resources, the immediate result is


A. extinction

B. emigration

C. competition

D. immigration


36. Which of the following disease ic caused by a bacterium?

A. ringworm

B. poliomyelitus

C. syphilis

D. malaria


37. Conservation of wildlife is necessary mainly because

A. wild species cannot resist disease better than their domesticated species

B. many predator wild animals help in the control of pests

C. it prevents extinction of species

D. many people derive pleasure from observing wild animals


Two unconscious patients X and Y whose blood group genotypes are AO and AB respectively were transfused with the blood from the same donor . Patient X immediately showed signs of difficulty in breathing while patient Y showed no negative reaction.


38. Patients X and Y were likely transferred with blood of genotype






39. What should the hospital have done to prevent X from showing the symptom described above? Patient X should have

A. undergone an agglutination test

B. been asked for the blood group

C. been screened for HIV

D. undergone malaria test


40. The greatest contribution to genetic studies was made by

A. Gregor Mendel

B. Thomas Morgan

C. Charles Darwin

D. Robert Hooke


41. The exchange of genes between homologous chromosomes is called

A. crossing over

B. back cross

C. test cross

D. mutation



42. The diagrams above are illustrations of the inheritance of coat colour in mice. J, K, L, M and N are parents. The cross between two parent mice gave rise to offspring P, Q, R and S. Which parent mouse is heterozygous for coat colour?

A. M

B. J

C. K

D. L


43. The diagrams above are illustrations of the inheritance of coat colour in mice. J, K, L, M and N are parents. The cross between two parent mice gave rise to offspring P, Q, R and S. Which of the offspring are all homozygous?

A. P

B. Q

C. S

D. R


44. Genes that remain linked are those

A. close to each other on the chromosomes

B. on the same locus on the chromosomes

C. on the homologous chromosomes

D. which are allelic pair


45. A plant cell has 14 chromosomes prior to mitosis. What is the number of chromosomes in the daughter cells?

A. 14

B. 56

C. 28

D. 7


46. The chemical bond that holds the bases of the two strands of DNA together is

A. oxygen bond

B. hydrogen bond

C. electrovalent bond

D. covalent bond




The diagram above is an illustration of one of the theories of evolution. Who proposed the theory in the illustration?

A. Louis Pasteur

B. Gregor Mendel

C. Robert Hooke

D. Jean Lamarck


48. The theory supports

A. natural selection

B. struggle for survival

C. independent assortment

D. the use and disuse of body parts


49. In evolution, fossils are naturally preserved in

A. rocks

B. water

C. chemicals

D. trees


50. Which of the following is not a social insect?

A. termite

B. housefly

C. honeybee

D. ant