NEET Biology question

When a freshwater protozoan, possessing a contractile vacuole, is placed in a glass containing marine water, the vacuole will

(A)Increase in number
(B)DisappearCorrect
(C)Increase in size
(D)Decrease in size

Answer: (B)

Solution

In marine (hypertonic relative to the cell) water, the osmotic gradient is reversed compared to freshwater, so water tends to move out of the cell rather than

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Question ID VK-087805