Question

A common characteristic of all vertebrates is

• A. Presence of skull
• B. Division of body into head, neck, trunk and tail
• C. Presence of two pairs of functional appendages
• D. Body is covered with an exoskeleton

Answer 1

The correct option is A Presence of skull

A. Vertebrates are advanced chordates having cranium (brain box) around the brain and hence, they are called as craniata. So, all vertebrates have skull i.e. cranium.

B. Their body consists of serially arranged vertebrae which comprises of a major part of their axial exoskeleton, the vertebral column or the backbone.

C. Their skin covered by protective skeleton that comprises of scales, feathers, hair, etc.

D. They have an endoskeleton which may be made up of cartilage or bones.

Hence, statement A is correct. So, the correct answer is 'Presence of skull'.