JAMB Biology 2021 Objective — Question 14
Question 14 of 40 from the Joint Admissions and Matriculation Board (JAMB) Biology 2021 Objective paper, with the correct answer and a full explanation.
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14. In which of the following organisms is diffusion efficient as a means of gaseous exchange? (a) rat (b) lizard (c) earthworm (d) cockroach
- A. rat
- B. lizard
- C. earthwormCorrect
- D. cockroach
Explanation
Diffusion is an effective means of gaseous exchange in earthworms (through their moist skin) but not in organisms like the lizard and rat, which have too large a body mass for diffusion alone to suffice.
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