First slide

Classification of Animals

Question

Cartilaginous endoskeleton, ventral mouth, gill-slits without operculum and skin with placoid scales are the characteristics of the class

Easy

A

Cyclostomata
B

Chondrichthyes
C

Osteichthyes
D

Amphibia

Solution

All these are the characteristics of the class Chondrichthyes. Cyclostomes also have cartilaginous endoskeleton but they don’t have placoid scales. Osteichthyes lack placoid scales. Amphibians have a moist skin without scales.

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