JAMB Biology Past Questions 2018
10 questions from the JAMB 2018 Biology paper, with answers and explanations. Tap "Show answer" under each one when you are ready.
JAMB 2018Question 1 · Animal Biology and Comparative Physiology
Which of the following groups of organisms has kidney as the excretory organ?
- A.Fishes, amphibians, birds, man
- B.Fishes, amphibians, annelids, insects
- C.Fishes, reptiles, birds, tapeworm
- D.Fishes, protozoans, amphibians, man
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Answer: A. Fishes, amphibians, birds, man
Fishes, amphibians, birds, and man are all vertebrates that use kidneys as their excretory organ.
JAMB 2018Question 2 · Cell Biology and Biochemistry
DNA in eukaryotic cells is contained in the
- A.central vacuole
- B.nucleus
- C.lysosome
- D.golgi body
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Answer: B. nucleus
DNA in eukaryotic cells is contained within the nucleus.
JAMB 2018Question 3 · Classification
A group of closely related organisms capable of interbreeding to produce the fertile offspring are known as members of a
- A.Kingdom
- B.class
- C.family
- D.species
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Answer: D. species
A species is a group of closely related organisms capable of interbreeding to produce fertile offspring.
JAMB 2018Question 4 · Ecology and Environment
Which of the following cycles involves the process of precipitation and transpiration?
- A.water cycles
- B.carbon cycle
- C.nitrogen cycle
- D.oxygen cycle
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Answer: A. water cycles
The water cycle involves precipitation and transpiration among other processes like evaporation and condensation.
JAMB 2018Question 5 · Ecology and Environment
Physiological adaptation to very dry conditions in animal demonstrates
- A.Xeromorphism
- B.Hibernation
- C.Aestivation
- D.Rejuvenation
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Answer: C. Aestivation
Aestivation is the physiological adaptation (dormancy) animals undergo to survive very dry/hot conditions.
JAMB 2018Question 6 · Genetics and Evolution
An accurate identification of a rapist can be carried out by conducting
- A.RNA analysis
- B.DNA analysis
- C.blood group test
- D.behavioural tests
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Answer: B. DNA analysis
DNA analysis (DNA fingerprinting) allows accurate identification of an individual, such as a rapist, from biological samples.
JAMB 2018Question 7 · Mammalian Physiology and Anatomy
The part of the ear which contains nerve cells sensitive to sound vibrations is the
- A.cochlea
- B.ampulla
- C.tympanum
- D.malleus
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Answer: A. cochlea
The cochlea contains the nerve cells (hair cells) sensitive to sound vibrations.
JAMB 2018Question 8 · Mammalian Physiology and Anatomy
Total salt content in blood is about
- A.1.85 to 1.9%
- B.11.85 to 11.9%
- C.2.85 to 2.9%
- D.0.85 to 0.9%
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Answer: D. 0.85 to 0.9%
The total salt content of blood is approximately 0.85 to 0.9%.
JAMB 2018Question 9 · Microbiology and Disease
Man can contact tapeworm through
- A.ingesting uncooked meat
- B.from fish
- C.from breathing
- D.through contact
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Answer: A. ingesting uncooked meat
Humans can contract tapeworm infection by ingesting uncooked/undercooked meat containing larval cysts.
JAMB 2018Question 10 · Plant Biology
Double fertilisation is a unique features of
- A.Angiosperms
- B.Bryophytes
- C.Pteridophytes
- D.Algae
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Answer: A. Angiosperms
Double fertilisation, producing both a zygote and endosperm, is a unique feature of angiosperms (flowering plants).
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