Jamb Biology Questions and Answers for 2020 (CBT)

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Jamb Biology Questions and Answers

Welcome to JAMB Biology questions and answers. It is important we learn the tricks and tip that will enable you to score high in the 2020 Jamb Biology questions.

The Joint Admission and Matriculation Board (JAMB) has its patterns of asking questions in biology and understanding the patterns and the key topics in Biology would help you perform well.

Tips to Score High in Jamb Biology Questions

  1. Study Intensively: It is of no doubt that studying hard would make you excel in any examination. You can see study tips here to walk you through.
  2. Eliminate Fear and exam Fever: Fear is one of the things that makes students score low in Jamb exams. Have the confidence that you can do it and score more than every other candidate. Put in your best and leave the rest for God.

Having said that, let’s move top the main business which Jamb questions and answers.

Jamb Biology Practice Questions and Answers

1. In the angiosperm, the sieve tube members are living non-nucleated, but they are usually accompanied by

A. Cork cambium

B. Phloem rays

C. Vascular cambium

D. Companion cells

2. Abscisic acid is a chemical that prepares plants for

A. ripening fruits

B. emergence of seedling

C. for leaf fall

D. reproduction

3. In any population, any specific allele will mutate at one time or another, usually to a non-functional or harmful form. The proportion of gametes carrying new mutant alleles of a given locus is called

A. the mutation rate

B. the selection coefficient

C. the relative fitness

D. the lethal genotype

4. In Mosses, the saprophyte generation is highly prominent producing spores in a cone like

A. gametophyte

B. strobilus

C. antheridium

D. archegonium

5. When osmotic acid is boiled with a solution of food substances, it gave a colour black precipitate showing the presence of

A. Fats and oil

B. proteins

C. amino acids

D. starch

6. plants adapted to life in salty march are known as

A. hydrophytes

B. xerophytes

C. halophytes

D. epiphytes

7. A circulatory system that does not allow mixing of oxygenated blood in the mammalian heart is referred to as

A. open

B. haemocoelic

C. single

D. closed

8 In a pyramid of numbers, it is common to have with the smallest of individual

A. secondary consumers

B. tertiary consumers

C. primary consumers

D. primary producers

9. One of these animal groups contain acoelomate member

A. Mollusca

B. coelenterate

C. Arthropoda

D. reptilian

10. A flower that has both stamen and pistil is said to be

A. perfect

B. imperfect

C. pistillate

D. staminate.

11. Sting cells are normally found in

A. flatworm

B. Hydra

C. Snails

D. Paramecium

12. The annulus of fern sporangium helps in

A. spore dispersal

B. conduction of mineral salt

C. trapping of light energy

D. water retention

13. The respiratory organ in the land snail is

A. Radula

B. mantle

C. tentacle

D. foot

14. The gill rakers of fishes take part in

A. feeding

B. respiration

C. swimming

D. diffusion

15. The element common to protein, carbohydrate, and lipid is

A. hydrogen

B. sulphur

C. Nitrogen

D. phosphorous

16. Which of the following is a plant excretory product?

A. Oil

B. cytokinin

C. resin

D. amino acid

17. Epigeal germination can be found in

A. sorghum

B. maize

C. millet

D. groundnut

18. Which of the following characters is NOT sex-linked

A. River blindness

B. Baldness

C. Haemophilia

D. Colour blindness

19. Which of the following diseases can be prevented by inoculation?

A. Syphilis

B. malaria fever

C. tuberculosis

D. acquired immune deficiency syndrome

20. Nitrogen-fixing micro-organism in leguminous plants live symbiotically in the

A. root nodules

B. tap roots

C. branch roots

D. root hairs

21. Frogs and toads are classified together in the vertebrate class as?

A. Aves

B. Reptiles

C. Amphibians

D. mammalian

22. Blood clotting is helped by

A. Na+

B. K+

C. Ca2+

D. Mg2+

23. On storage, the sweetness of corn is lost. This is because

A. polysaccharide is reconverted into soluble sugar

B. concentration of sugar increases due to storage

C. conversion of sugar to polysaccharide

D. enzymes responsible for the conversion are destroyed

24. One of these arthropods is a carrier of viruses and other micro-organisms

A. termite

B. Ant

C. Bee

D. flea

25. The enzyme responsible for curdling of milk in infants is called

A. pepsin

B. renin

C. trypsin

D. urease

26. In mammals, the function of sebaceous gland is to

A. produce sweat

B. produce an oily substance

C. secrete water

D. secrete sodium

See: How to Check Jamb Result For 2020/2021 With Phone or Registration Number.

27. movement and positions of the head in man are detected by the

A. Cochlea

B. Malleus

C. Utriculus

D. semicircular canals

28. The maize grain is fruit and not a seed because it

A. has a large endosperm

B. is formed from an ovary

C. is a monocotyledon

D. has no plumule and radicals

29. The character by which an organism is recognized is termed its

A. phenotype

B. genotype

C. anatomy

D morphology

30. In mammals, stimulus is transferred from the receptor to the central nervous system through the

A. moto neurons

B. effector muscle

C. dendrites

D. sensory neurons

31. Germinations which result in cotyledons being brouht abovebground is called?

A. hypocytyls

B. epicotyls

C. epigeal

D. hypogeal

32. Which of the food chains are the correct sequences?

A. weeds, tadpoles, beetle, man

B. weeds, tadpoles, fish, beetle, man

C. tadpoles, beetles, weeds, man, fish

D. man, fish, beetles, weeds

33. The primary and secondary hosts respectively of bilharzia are

A. fish and man

B. man and dog

C. snail and man

D. man and snail

34. The origin of mineral particles in the seed is

A. humus

B. water

C. micro-organism

D. organic matter

35. The initial was volume of water in bag of dry soil was 50ml and the amount that drained through was 35ml, the percentage water content of the fully soak soil is therefore

A. 46.7

B. 25.0

C. 20.0

D. 30.0

36. From the following list of types of mutation, identify the one that is not hereditary

A. genetic mutation

B. somatic mutaion

C. germinal mutation

D. gametic mutation

37. In a cell, digestive enzymes mostly occur in

A. ribosomes

B. lysosomes

C. mitochondria

D. plastids

38. which of the following habitats form the highest diversity of living species?

A. tropical rain forest

B. savannah grassland

C. desert

D. tropical forests

39. Lack of protein in the diet of children manifest easily because

A. children do not store up protein efficiently

B. it is difficult for children to chew meat

C. protein supplies energy to the body

D. protein is responsible for growth and repairs

40. Growth response of a plant to light gradient is known as

A. nastic movement

B. geotropism

C. hydrotropism

D. phototropism

I hope you like the Jamb questions and answers.

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