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Statement I: A shark can stay at a desired level in water without much expenditure of energy.
Statement II: Shark has a buoyancy regulating organ called the swim bladder.

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Statement-I is correct but Statement-II is incorrect

Statement-I is incorrect but Statement-II is correct

Both Statement-I and II are incorrect

Both Statement-I and II are correct

answer is C.

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Detailed Solution

Air bladder is absent in sharks (Chondrichthyes), and so they have to swim constantly to avoid sinking.

Bony fishes (Chondrichthyes) have air bladder acting as a hydrostatic organ helping the fish float easily at the desired level without much expenditure of energy.

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