Question

Which characteristic is unique to vertebrates?

a) Presence of a notochord
b) Radial symmetry
c) Exoskeleton
d) Lack of a backbone

Answer 1

Vertebrates have a unique characteristic called the vertebral column or backbone.

Step-by-step explanation:

The unique characteristic of vertebrates is the presence of a vertebral column, or backbone. The backbone is made up of separate bones called vertebrae, which provide support and protection for the spinal cord.