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JAMB Biology Past Questions 2020

10 questions from the JAMB 2020 Biology paper, with answers and explanations. Tap "Show answer" under each one when you are ready.

JAMB 2020Question 1 · Animal Biology and Comparative Physiology
The excretory structure in the earthworm is the
  1. A.malphighian tubule
  2. B.flame cell
  3. C.nephridium
  4. D.kidney
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Answer: C. nephridium

The nephridium is the excretory structure found in the earthworm.

JAMB 2020Question 2 · Animal Biology and Comparative Physiology
Which of the following vertebrates has the most simple structured heart
  1. A.reptile
  2. B.fish
  3. C.mammal
  4. D.Amphibian
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Answer: B. fish

The fish has the simplest structured heart among vertebrates, with only two chambers (one atrium, one ventricle).

JAMB 2020Question 3 · Cell Biology and Biochemistry
For growth to occur in organisms, the rate of
  1. A.anabolism must exceed that of catabolism
  2. B.catabolism must exceed that of anabolism
  3. C.food storage must be low
  4. D.food storage must be high
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Answer: A. anabolism must exceed that of catabolism

For growth to occur, the rate of anabolism (building up) must exceed that of catabolism (breaking down).

JAMB 2020Question 4 · Ecology and Environment
The butterfly is of great economic importance because
  1. A.of it's use in scientific studies
  2. B.it sucks nectar from flowers
  3. C.it adds to the beauty of the environment
  4. D.it pollinates flowers of crops and other plants
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Answer: D. it pollinates flowers of crops and other plants

Butterflies are economically important because they pollinate flowers of crops and other plants.

JAMB 2020Question 5 · Ecology and Environment
A group of organism of different species living in a particular area is described as a
  1. A.colony
  2. B.community
  3. C.population
  4. D.niche
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Answer: B. community

A community is a group of organisms of different species living together in a particular area.

JAMB 2020Question 6 · Ecology and Environment
The only caste in the termite colony whose members can feed themselves are the
  1. A.workers
  2. B.reproductives
  3. C.soldiers
  4. D.nymphs
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Answer: A. workers

Workers are the only caste in a termite colony whose members can feed themselves; other castes are fed by workers.

JAMB 2020Question 7 · Genetics and Evolution
In a population of living things, the parameters of size, height, weight and colours are examples of
  1. A.continuous variation
  2. B.non-heritable variation
  3. C.discontinuous variation
  4. D.physiological variation
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Answer: A. continuous variation

Size, height, weight, and colour typically vary continuously across a range of values, making them examples of continuous variation.

JAMB 2020Question 8 · Mammalian Physiology and Anatomy
Deamination occurs in the?
  1. A.Kidney
  2. B.Pancreas
  3. C.Spleen
  4. D.Liver
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Answer: D. Liver

Deamination, the removal of the amino group from excess amino acids, occurs in the liver.

JAMB 2020Question 9 · Mammalian Physiology and Anatomy
The ability of the eyes to focus on both near and distance objects is termed
  1. A.image formation
  2. B.refraction
  3. C.hypermetropia
  4. D.accommodation
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Answer: D. accommodation

Accommodation is the ability of the eye to adjust its focus for both near and distant objects.

JAMB 2020Question 10 · Microbiology and Disease
The smallest living organism which share the characteristics of both living and non-living matter are
  1. A.bacteria
  2. B.fungi
  3. C.viruses
  4. D.protozoa
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Answer: C. viruses

Viruses are the smallest organisms that share characteristics of both living and non-living matter.

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