Multiple choice

Both the kidneys and the contractile vacuoles of amoeba have similar function in

  1. expelling out glucose

  2. expelling out salts

  3. expelling out excess of water

  4. expelling out minerals
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The contractile vacuole is known as the kidney of the protozoans. Its function is to pump out excess water from the cytoplasm of amoeba. They are most prominent and active in freshwater amoebae as marine amoebae are closer to isotonicity with seawater than freshwater.

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