First slide

Classification of Animals

Question

Choose the incorrect statement regarding Petromyzon.

Moderate

A

Skull is without cranium.
B

Mouth is without jaws.
C

Skin is without scales.
D

Embryo is without amnion.

Solution

Petromyzon is a vertebrate (craniate). Cranium and vertebral column are cartilaginous.
Only reptiles, birds and mammals are amniotes.

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