Biology > 2014 > 15
JAMB UTME
A circulatory system is very essential in mammals but not in smaller organisms like Amoeba because
A.
diffusion is sufficient to transport materials in Amoeba
B.
Amoeba lacks blood containing haemoglobin
C.
Amoeba exhibits anaerobic respiration
D.
Amoeba lives in freshwater
Answer: A
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