Assertion: Cartilaginous fish swim constantly | vedclass

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Question

(A) Cartilaginous fishes (Class $Chondrichthyes$) lack an air bladder (swim bladder), which is a gas-filled organ that provides buoyancy in bony fishe

Vedclass · Accepted Answer

Both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.

Vedclass · Answer

(A) Cartilaginous fishes (Class $Chondrichthyes$) lack an air bladder (swim bladder), which is a gas-filled organ that provides buoyancy in bony fishes.Because they lack this organ, they are denser than water and tend to sink if they stop swimming.Therefore, they must swim constantly to maintain their position in the water column and prevent sinking.Thus, both the Assertion and the Reason are true, and the Reason correctly explains the Assertion.

Assertion: Cartilaginous fish swim constantly to avoid sinking.
Reason: In cartilaginous fishes, the air bladder is absent.

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Assertion: Cartilaginous fish swim constantly to avoid sinking.Reason: In cartilaginous fishes, the air bladder is absent.