Scroll valve is present in

Respiratory system of cartilaginous fishes

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Intestine of cartilaginous fishes

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Intestine of bony fishes

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Respiratory system of bony fishes

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Solution

The correct option is A Intestine of cartilaginous fishes
Scroll valve is a spiral valve usually present in the intestine of cartilaginous fishes i.e. in class Chondrichthyes. It increase the surface area for absorption in intestine. This ensures maximum absorption of nutrients from the food.
So, the correct answer is 'Intestine of cartilaginous fishes'.

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Similar questions

Give one example of (a) cartilaginous fish; (b) bony fish.

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