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JAMB Biology Past Questions 2024

10 questions from the JAMB 2024 Biology paper, with answers and explanations. Tap "Show answer" under each one when you are ready.

JAMB 2024Question 1 · Animal Biology and Comparative Physiology
Mouth part adapted for piercing and sucking is found in
  1. A.housefly
  2. B.grasshopper
  3. C.mosquito
  4. D.cockroach
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Answer: C. mosquito

The mosquito has mouthparts adapted for piercing and sucking, used to feed on blood.

JAMB 2024Question 2 · Cell Biology and Biochemistry
In glycolysis, glucose is broken down through series of reactions in the presence of enzyme and absence of oxygen to produce
  1. A.Acetyl-coenzyme + ATP
  2. B.Phosphorylated glucose
  3. C.pyruvic acid + ATP
  4. D.Amino acid
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Answer: C. pyruvic acid + ATP

Glycolysis breaks down glucose anaerobically to produce pyruvic acid and ATP.

JAMB 2024Question 3 · Ecology and Environment
Which of the following plant is found in the ground layer of a tropical rainforest in Nigeria?
  1. A.obeche
  2. B.liverwort
  3. C.mahogany
  4. D.oil palm
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Answer: B. liverwort

Liverworts are found in the ground layer of a tropical rainforest in Nigeria.

JAMB 2024Question 4 · Ecology and Environment
An example of organism that exhibits counter-shading to escape from its predator is
  1. A.grasshopper
  2. B.toad
  3. C.fish
  4. D.chameleon
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Answer: C. fish

Fish exhibit countershading (darker on top, lighter underneath) as camouflage to escape predators.

JAMB 2024Question 5 · Genetics and Evolution
Inbreeding is highly discouraged in humans because it may
  1. A.increase the death rate of new born
  2. B.lead to the birth of dwarfs
  3. C.lead to high rate of competition among offspring
  4. D.lead to outbreak of hereditary diseases
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Answer: D. lead to outbreak of hereditary diseases

Inbreeding is discouraged in humans because it increases the likelihood of expressing recessive hereditary diseases.

JAMB 2024Question 6 · Genetics and Evolution
Lamarck's theory of evolution is based on the idea of
  1. A.the inheritance of acquired traits
  2. B.organisms' survival of the fittest
  3. C.organisms constantly struggling for existence
  4. D.plenty offspring produced by organisms
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Answer: A. the inheritance of acquired traits

Lamarck's theory of evolution is based on the idea of inheritance of acquired characteristics/traits.

JAMB 2024Question 7 · Mammalian Physiology and Anatomy
The central nervous system comprises of
  1. A.brain and somatic
  2. B.brain and spinal cord
  3. C.spinal cord and somatic
  4. D.brain only
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Answer: B. brain and spinal cord

The central nervous system comprises the brain and spinal cord.

JAMB 2024Question 8 · Mammalian Physiology and Anatomy
The cone in the retina of eye is an example of
  1. A.cell
  2. B.tissue
  3. C.organ
  4. D.system
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Answer: A. cell

A cone (photoreceptor) in the retina is an example of a single specialized cell.

JAMB 2024Question 9 · Microbiology and Disease
Infectious diseases are caused by
  1. A.bacteria
  2. B.protists
  3. C.Amoeba
  4. D.protozoa
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Answer: A. bacteria

Bacteria are a common cause of infectious diseases.

JAMB 2024Question 10 · Plant Biology
After fertilization in plants, the zygote develops into
  1. A.fruit
  2. B.an embryo
  3. C.seed
  4. D.an endosperm
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Answer: B. an embryo

After fertilization, the zygote develops into an embryo.

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