Question

Common characteristic of all vertebrates, without exception is

• A. Presence of exoskeleton
• B. Presence of well developed skull
• C. Two pairs of functional appendages
• D. Division of body into head, neck, trunk and tail

Answer 1

The correct option is B Presence of well developed skull

All vertebrates have a living endoskeleton. The characteristic of vertebrates without exception is the presence of a brain. The brain is set inside a bony box called as the cranium. Cranium is made up of eight bones. It protects the human brain from mechanical injury.
Therefore, the correct answer is option B.