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1. |
Two species of Amoeba X and Y were kept in fresh water and got adapted. Species X developed contractile vacuole. When both were transferred to sea water and got adapted, both X and Y lost their contractile vacuole. From these observation we conclude that [AFMC 1983, AIIMS 1983] |
A. | Both X and Y are marine species |
B. | Species Y is marine and X is fresh water |
C. | Species X is marine and Y is fresh water |
D. | Both X and Y are fresh water |
Answer» D. Both X and Y are fresh water | |