Mammalian kidney resembles contractile vacuole of Amoeba in excretion of
A
Glucose
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B
Excess water
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C
Urea
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D
Ammonia
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Solution
The correct option is B Excess water Contractile vacuoles are responsible for maintaining homeostasis by osmoregulation. It is a membrane enveloped cellular organelle, found in many microorganisms, that periodically expands, filling with water, and then contracts, expelling its contents to the cell exterior. It's function is analogous to human kidneys.