JAMB Biology 2022 Objective — Question 1
Question 1 of 40 from the Joint Admissions and Matriculation Board (JAMB) Biology 2022 Objective paper, with the correct answer and a full explanation.
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A circulatory system is very essential in mammals but not in smaller organisms like amoeba because
- A. Amoeba lives in fresh water
- B. Diffusion is sufficient to transport materials in AmoebaCorrect
- C. Amoeba lacks blood containing haemoglobin
- D. Amoeba exhibits anaerobic respiration
Explanation
Amoeba, being a unicellular organism, has a large surface area to volume ratio; diffusion alone is sufficient as a means of transport, so it does not need a circulatory system.
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