Multiple choice

Mammalian kidney resembles contractile vacuole of Amoeba in the excretion of :

  1. glucose

  2. excess water

  3. urea

  4. ammonia
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Single contractile vacuole is found in fresh water Amoeba. It appears like a bubble of clear, watery fluid, enclosed within a decicate and elastic condensation membrane resembling plasmalemma. its function is osmoregulation, i.e. excess amount of water collected in it an discharged out by it. The water collected in contractile vacuole contain trace of ammonia.

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