1. Which of the following structures will NOT be found in the nucleus of a cell?
   A. DNA
   
   B. Nucleolus
   
   C. Lysosome
   
   D. Centriole
   
   
2. An example of organ level of organization is _
   A. bird
   
   B. kidney
   
   C. spermatozoon
   
   D. xylem
   
   
3. A structural similarity between Paramecium and Amoeba is the presence of______
   A. one food vacuole
   
   B. two contractile vacuoles
   
   C. two nuclei
   
   D. one gullet
   
   
4. The classes of plants the root systems in diagrams I and II above represent respectively are__________
   A. Dicotyledoneae and Monocotyledoneae
   
   B. Monocotyledoneae and Dicotyledoneae
   
   C. Dicotyledoneae and Dicotyledoneae
   
   D. Monocotyledoneae and Monocotyledoneae
   
   

The diagram above is an illustration of a stage in a biological process. Study it and answer questions 5 and 6

5. What stage of cell division is illustrated in the diagram?
   A. Prophase
   
   B. Metaphase
   
   C. Anaphase
   
   D. Telophase
   
   
6. The part labeled I is the
   A. centriomere
   
   B. spindle fibre
   
   C. centriole
   
   D. chiasmata
   
   
7. The rate of diffusion of molecules between two media will be higher if_________?
   A. the difference in concentration of the two media is low
   
   B. the difference in concentration of the two media is negligible
   
   C. the difference in concentration of the two media is high
   
   D. there is no difference in the concentration of the two media
   
   
8. Anaerobic respiration in the organism illustrated in the diagram above produces carbon dioxide and________
   A. ethanol
   
   B. water
   
   C. oxygen
   
   D. glucose
   
   
9. Underground storage stems which grow horizontally in the soil are_______
   A. bulbs
   
   B. runners
   
   C. rhizomes
   
   D. corms
   
   
10. Muscle fatigue in the body of an athlete is due to__________
    A. low pH
    
    B. high oxygen content
    
    C. accumulation of lactic acid
    
    D. accumulation of carbonic acid
    
    
11. The heart can beat continuously without being fatigued because it is composed of________
    A. skeletal muscles
    
    B. smooth muscles
    
    C. cardiac muscles
    
    D. renal muscles
    
    
12. The products of tissue respiration are_________
    A. glucose, oxygen, and water
    
    B. oxygen, water, and energy
    
    C. glucose, carbon dioxide, and energy
    
    D. water, carbon dioxide, and energy
    
    
13. Excretory products in plants responsible for the discoloration of flowers are called__________
    A. alkaloids
    
    B. tannins
    
    C. anthocyanins
    
    D. resins
    
    
14. The process of maintaining a steady internal environment is known as__________
    A. osmoregulation
    
    B. equilibration
    
    C. homeostasis
    
    D. plasmolysis
    
    
15. Which of the following statements is not true about hormones?
    A. Their responses are voluntary
    
    B. They may affect more than one target organ
    
    C. They are chemical messengers in animals
    
    D. They are transported by the blood to the target organs
    
    

The diagram above is an illustration of a human brain. Study it and answer questions 16 and 17

16. The part labelled I is the_________
    A. olfactory lobe
    
    B. cerebellum
    
    C. cerebrum
    
    D. medulla oblongata
    
    
17. The function of the part labelled II is that it controls_______
    A. posture and balance of the body
    
    B. all voluntary actions
    
    C. temperature and appetite
    
    D. many involuntary actions
    
    
18. To focus on a distant object, the ciliary muscle of the eye______
    A. contracts and the eye lens gets thicker
    
    B. relaxes and the eye lens gets thinner
    
    C. contracts and the eye lens gets thinner
    
    D. relaxes and the eye lens gets thicker
    
    
19. The main function of the amniotic fluid is for______________
    A. respiration in the foetus
    
    B. protection of the foetus from shock
    
    C. lubricating the birth canal foetus
    
    D. nourishing the foetus
    
    

The diagram above is an illustration of the longitudinal section of a flower. Study it and answer questions 20 and 21

20. Which part of the flower is responsible for the protection of young flower buds?
    A. I
    
    B. II
    
    C. III
    
    D. IV
    
    
21. The essential parts of the flower are labelled_______
    A. I, II and III
    
    B. II, III and IV
    
    C. III, V and VI
    
    D. IV, V and VI
    
    
22. Deficiency in insulin could lead to________
    A. cirrhosis
    
    B. hepatitis
    
    C. diabetes
    
    D. nephritis
    
    
23. Which of the following forms of energy is utilized during photosynthesis?
    A. Potential
    
    B. Kinetic
    
    C. Solar
    
    D. Chemical
    
    
24. Light is excluded from a water culture experiment in order to________
    A. prevent overheating of the roots
    
    B. enable the roots to grow straight down
    
    C. prevent ionization of water molecules
    
    D. prevent the growth of algae
    
    
25. The major mineral present in the shell of Molluscs is________
    A. Copper
    
    B. Sodium
    
    C. Iron
    
    D. Calcium
    
    
26. The digestion of proteins starts in the______
    A. small intestine
    
    B. stomach
    
    C. large intestine
    
    D. mouth
    
    
27. Tooth decay is usually caused by___________
    A. undigested and absorbed food
    
    B. eating a limited amount of sweetened food
    
    C. the bacteria in the mouth that metabolize sugar to acids
    
    D. eating a lot of proteinous foods
    
    
28. The conversion of ammonium salts into nitrates is called_______
    A. putrefaction
    
    B. denitrification
    
    C. fixation
    
    D. nitrification
    
    
29. The salinity of a brackish habitat________
    A. increases immediately after rainfall
    
    B. increases at the end of the rain
    
    C. decreases with an increase in the number of organisms
    
    D. increases during the dry season
    
    
30. If 90 ants are found in a field with a total area of 100 m², what is the population density of the ants?
    A. 0.09
    
    B. 0.90
    
    C. 9.00
    
    D. 90.00
    
    
31. The complex relationship between the members of a community and their physical environment is known as________
    A. commensalism
    
    B. symbiosis
    
    C. saprophytism
    
    D. ecology
    
    
32. The specific role of a species within its environment is known as its_________
    A. habitat
    
    B. niche
    
    C. trophic level
    
    D. biotic community
    
    
33. Which of the following soil fertility improvement methods will have the most negative effect on the ecosystem if not controlled?
    A. Application of N-P-K fertilizer
    
    B. Shifting cultivation
    
    C. Mixed farming
    
    D. Crop rotation
    
    
34. Organisms in an ecosystem are usually grouped according to their trophic level into__________
    A. carnivores and omnivores
    
    B. consumers and parasites
    
    C. producers and saprophytes
    
    D. producers and consumers
    
    
35. In the pyramid of energy illustrated above, the organism with the least amount of transferred energy is___________
    A. Spirogyra
    
    B. Tadpole
    
    C. Fish
    
    D. Bird
    
    
36. Tall trees with unbranched trunks which grow above the upper storey of the forest are commonly referred to as _
    A. Emergents
    
    B. Herbs
    
    C. Lianes
    
    D. Shrubs
    
    
37. Maize grains are best stored against insect attacks by____________
    A. keeping in a silo
    
    B. storing in the room
    
    C. leaving them on their cobs
    
    D. covering with leaves
    
    
38. Cholera is mostly spread by_______
    A. air
    
    B. soil
    
    C. water
    
    D. noise
    
    
39. Which of the following resources is renewable?
    A. Petroleum
    
    B. Coal
    
    C. Iron
    
    D. Trees
    
    
40. Which of the following roles is not performed by a government agency responsible for forest maintenance?
    A. Regulating the harvest of timber and poaching
    
    B. Creating, protecting and managing the forest reserves
    
    C. Tracking the movement of timber, wood, and wildlife
    
    D. Regulating mining activities in the forest
    
    
41. Which of the following factors is not a source of variation in living organisms?
    A. Environment
    
    B. Inheritance
    
    C. Mitosis
    
    D. Meiosis
    
    
42. Individuals with blood group AB can donate blood to individuals with blood group(s)_?
    A. A and B
    
    B. A and O
    
    C. AB only
    
    D. O only
    
    

The diagram above is an illustration of a process occurring in a living animal cell. Study it and answer questions 43 and 44

43. The process occurs in the _
    A. Nucleus
    
    B. Mitochondrion
    
    C. Golgi body
    
    D. Cytoplasm
    
    
44. The process is called_______
    A. replication
    
    B. cell maturation
    
    C. crossing over
    
    D. mutation
    
    
45. Which of the following nucleotides is not found in the DNA molecules?
    A. Adenine
    
    B. Cytosine
    
    C. Guanine
    
    D. Uracil
    
    
46. In a complete dominance monohybrid cross between a pure breeding yellow-flowered plant Y and a pure breeding white-flowered plant y, the result of the first filial generation is _
    A. 50 % yellow flowers
    
    B. 75% yellow flowers
    
    C. all yellow flowers
    
    D. all white flowers
    
    
47. A man whose blood group is heterozygous B is married to a woman whose blood group is also heterozygous B. Which of the following statements is correct about the blood group of their four offspring?
    A. Three of them belong to blood group B
    
    B. Three of them belong to blood group O
    
    C. None of them belongs to blood group O
    
    D. Two of them belong to blood group B
    
    
48. The cross between RrTt and rrtt where R is a gene for red colour and T for tallness will result in______
    A. all the offspring being tall with red fruits
    
    B. 25 % tall with red fruits
    
    C. 50 % tall with red fruits
    
    D. 75 % tall with red fruits
    
    
49. The yellow and black stripes on the body of wasps is an example of________
    A. mimicry
    
    B. courtship behaviour
    
    C. camouflage
    
    D. warning colouration
    
    
50. The biological importance of the dance by the worker honeybee is that it___________
    A. acts as a signal for mating
    
    B. serves as a warning signal
    
    C. signals the availability of food
    
    D. serves as a means of identifying members of the caste