A marine protozoan is likely to have no contractile vacuole mainly because the cytoplasm is

A marine protozoan is likely to have no contractile vacuole mainly because the cytoplasm is
  • A.
    isotonic to sea water
  • B.
    hypotonic to sea water
  • C.
    hypertonic to sea water
  • D.
    impervious to sea water
Correct Answer: Option A
Explanation
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