First slide

Classification of Animals

Question

The scales of Scoliodon are

Easy

A

ctenoid
B

cycloid
C

cosmoid
D

placoid

Solution

The skin of cartilaginous fishes (e.g., Scoliodon) is tough, containing minute placoid scales.
Cycloid, ctenoid and cosmoid scales are found in bony fishes (Osteichthyes).

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