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Class Chondrichthyes

Placoid scale...

Question

Placoid scales are found in

A

Reptiles

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B

Bony fishes

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C

Cartilaginous fishes

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D

Amphibians

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Solution

The correct option is C Cartilaginous fishes
Reptiles have epidermal scales.
Fishes have dermal scales. Cartilaginous fishes characteristically have placoid scales, whereas bony fishes have ctenoid and cycloid scales.
Amphibians generally do not have scales.

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