Practice Biology Jamb Past Questions

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Jamb Past Questions

Duration: 30 minutes

1. A large percentage of tropical soil tend to be acidic because they:
A. Contain large quantities of pottash
B. contain large quantities of lime
C. loose a high proportion of their organic matter to running water
D. loose lime and pottash from the top soil through rain action
2. The following are methods of soil conservation EXCEPT
A. Contour terracing
B. strip cropping
C. contour ploughing
D. contour terracing
3. Samples of different soil types are packed in glass tubes whose lower ends are plugged with cotton wool. If these tubes are suspended in a trough of water, water will rise highest after a few hours in
A. Sand
B. Loam
C. Clay
D. Humus
4. The function of endoplasmic reticulum is
A. Protein synthesis
B. intracellular transport of materials
C. digestion and destruction of foreign bodies
D. Production of energy from glucose
5. If an organism obtains it's food by means of haustoria, it is said to be
A. holophytic
B. heterotrophic
C. saprophytic
D. parasitic
6. Which of the following relationships involve only one organism
A. Saprophytism
B. commensalism
C. parasitism
D. symbiosis
7. Which of these has the greatest influence on the distribution of animals in marine and freshwater habitats?
A. pH
B. Salinity
C. Water Current
D. Turbidity
8. Which of these group of animals is likely to be found in fresh water
A. Blod worm, Pond skater and scorpion
B. Blod worm, Pond skater and dragon fly
C. Pond skater, scorpion and dragon fly larva
D. Pond skate, blood worm and ant-lion
9. One of the characteristics of plants in the savanna is the
A. Possession of thin, smooth, barks
B. posssession of large tap roots
C. aproduction of seedlings on mother plant
D. Possession of thick plaky barks
10. Which of the following diseases can be contracted in areas with fast flowing rivers
A. Schistosomiasis
B. Elephantiasis
C. Syphilis
D. Onchocerciasis
11. The mineral nutrient that is most bound to the soil is
A. Phosphorous
B. Calcium
C. Iron
D. Pottasium
12. Dead plants and animals are decomposed by bacteria and fungi into
A. Nitrates
B. Nitrites
C. Amino acids
D. Ammonia
13. Viruses are considered to be living organisms because they
A. Possess transmittable characters
B. move from one place to another
C. respond to stimulation
D. ingest food materials
14. Which of the following is a sex-linked character
A. Sickle cella anaemia
B. Tongue rolling
C. Skin colour
D. Colour blindness
15. In an ecosystem, the LEAST efficient energy transfer link is from
A. producers to consumeers
B. sun to producers
C. primary consumers to secondary consumers
D. secondary consumers to decomposers
16. Lichen is an example of a
A. saprophyytic organism
B. symbiotic association
C. epiphytic plant
D. carnivorous plant
17. which of the following diseases can be caused by bacterium
A. Ringworm
B. pPoliomyelitis
C. Malaria
D. Syphilis
18. Farmers practice crop rotation because
A. It helps to prevent soil erosion
B. allows two crops to be planted at the same time
C. Helps to conserve soil fertility
D. is an alternative to shifting cultivation
19. Coldblooded animals are referred to as
A. Poikilothermic
B. Homothermic
C. Polythermic
D. Homeostatic
20. Which of the following organisms have lost the pentadactyl limb structure?
A. Bat
B. Fish
C. Frog
D. Pigeon
21. Which soil type is the most difficult to plough in a wet season?
A. Loamy
B. Clay
C. sanndy
D. silty
22. A farm practice that result in the loss of soil fertility is
A. mixed farming
B. bush fallowing
C. shifting cultivation
D. continuous cropping
23. Paternity disputes can most accurately be resolved through the use of
A. Fingerprinting
B. Blood group typing
C. DNA analysis
D. tongue-rolling
24. In a modern Mendelian cross of red and white varieties of the four o'clock plant, the F1 generation expresses incomplete dominance by having flowers which are
A. White
B. Red
C. Pink
D. Multicoloured
25. Identical twins inherit their genes from
A. different eggs and sperms
B. the same egg and sperm
C. two eggs and a perm
D. one egg and two sperms

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