First slide

Classification of Animals

Question

All vertebrates possess

Easy

A

paired appendages
B

upper and lower jaws
C

chambered heart
D

bony endoskeleton

Solution

All the vertebrates possess a ventral heart with two to four chambers. Paired appendages and jaws are absent in agnathans. Endoskeleton is entirely cartilaginous in cyclostomes and cartilaginous fishes (Chondrichthyes)

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