Mammalian kidney resemble 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 C Excess water
Excretory systems (kidneys in higher vertebrates) have evolved that function in both osmoregulation and in the disposal of metabolic wastes. In simple protist organisms, like an amoeba, contractile vacuoles serve the purpose of osmoregulation. Option B is the correct answer.