Biology 2012 JAMB Past Questions
Biology 2012 JAMB Past Questions
1. Which of the following is most advanced in the evolutionary trend of animals?
- A. Liverfluke
- B. Earthworm
- C. Snail
- D. Cockroach
Correct Answer: Option D
2. Which of the following is the lowest category of classification?
- A. class
- B. species
- C. family
- D. genus
Correct Answer: Option B
3. Plants that show secondary growth are usually found among the
- A. thallophytes
- B. pteridophytes
- C. monocotyledons
- D. dicotyledons
Correct Answer: Option A
4. The fungi are distinct group of eukaryote mainly because they have
- A. spores
- B. no chlorophyll
- C. many fruiting bodies
- D. sexual and sexual reproduction
Correct Answer: Option A
5. An arthropod that is destructive at early stage of its life cycle is
- A. butterfly
- B. mosquito
- C. bee
- D. millepede
Correct Answer: Option A
6. An animal body that can be cut along its axis in any plane to give two identical parts is said to be
- A. radially symmetrical
- B. bilaterally symmetrical
- C. asymmetrical
- D. symmetrical
Correct Answer: Option A
7. Which of the following possesses mammary gland?
- A. Dogfish
- B. whale
- C. shark
- D. catfish
Correct Answer: Option B
8.The feature that links birds to reptiles in evolution is the possession of
- A. feathers
- B. break
- C. skeleton
- D. scales
Correct Answer: Option D
9. Countershading is an adaptive feature that enables animals to
- A. fight enemies
- B. remain undetected
- C. warn enemies
- D. attract mates
Correct Answer: Option B
10. Which of the following plant structures lacks a waterproof cuticle?
- A. leaf
- B. stem
- C. root
- D. shoot
Correct Answer: Option C
11. In the mammalian male reproductive system, the part that serves as a passage for both urine and semen is the
- A. urethra
- B. urter
- C. bladder
- D. seminal vesicle
Correct Answer: Option A
12. In plants which of the following is required in minute quantities for growth?
- A. Copper
- B. Potassium
- C. Phosphorus
- D. Sodium
Correct Answer: Option A
13. Which of the following organisms is both parasitic and autotrophic?
- A. Sundew
- B. Lorathus
- C. Rhizopus
- D. Tapeworm
Correct Answer: Option A
14. A function of the hydrochloric acid produced in the human stomach during digestion is to
- A. neutralise the effect of bile
- B. coagulate milk protein and emulsify fats
- C. stop the action of ptyalin
- D. break up food into smaller particles
Correct Answer: Option C
15. Which of the following is a polysaccharide?
- A. Glucose
- B. Sucrose
- C. Maltose
- D. Cellulose
Correct Answer: Option D
16. In the kidney of mammals, the site of ultrafiltration is the
- A. uriniferous tubule
- B. Bowman's capsule
- C. loop of Henle
- D. renal tubule
Correct Answer: Option B
17. Which of the following is involved in secondary thickening in plants?
- A. Collenchyma and xylem cells
- B. Vascular cambium
- C. Cork cambium and sclerenchyma
- D. Vascular cambium and cork cambium
Correct Answer: Option D
18. An example of a fruit that develops from a single carpel is
- A. okro
- B. tomato
- C. bean
- D. orange
Correct Answer: Option C
19. Plant growth can be artificially stimulated by the addition of
- A. gibberellin
- B. kinin
- C. abscisic acid
- D. ethylene
Correct Answer: Option A
20. The autonomic nervous system consists of neurons that control the
- A. voluntary muscles
- B. heart beat
- C. tongue
- D. hands
Correct Answer: Option B
21. The water cycle is maintained mainly by
- A. evaporation of water in the environment
- B. evaporation and condensation of water in the environment
- C. condensation of water in the environment
- D. transpiration and respiration in plants
Correct Answer: Option B
22. Plants of temperate origin can be grown in tropical areas in the vegetation zones of the
- A. rain forest
- B. guinea savanna
- C. sudan savanna
- D. montane forest
Correct Answer: Option B
23.Organisms living in an estuarine habitat are adapted to
- A. withstand wide fluctuations in temperature
- B. survive only in water with low salinity
- C. withstand wide fluctuations in salinity
- D. feed only on phytoplankton and dead organic matter
Correct Answer: Option C
24. The presence of stilt roots, pneumatophores, sunken stomata and salt glands are adaptive features of plants found in the
- A. tropical rainforest
- B. mangrove swamps
- C. gressland
- D. montane forest
Correct Answer: Option B
25. Which of the following animals can exist solely on the water they get from food and metabolic reactions?
- A. forest arboreal dweller
- B. Desert dwellers
- C. forest-ground dweller
- D. rainforest dwellers
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