First slide

Classification of Animals

Question

Mark the correct statement.

Moderate

A

Crocodiles have a three-chambered heart.
B

Cyclostomes are without jaws and paired fins.
C

Prototherians possesses external ear pinnae.
D

Bony fishes have claspers and air bladder.

Solution

Cyclostomes are without jaws and paired fins.
Crocodiles have a four chambered heart.
Prototherians(egg laying mammals) lack pinnae.
Bony fishes have air bladder, but not claspers.

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