Question

Skeletons of early vertebrates were composed of cartilage instead of bone. Which characteristic does cartilage share with notochords?

A. It is hard and rigid.

B. It is soft and flexible.

C. It contracts.

D. Oxygen can diffuse through it

Answer 1

The answer should be B. Fell your nose for example try to bend the bone on the tip that is Cartilage and its flexible and soft.

Answer 2

I think B correct me and report me if I'm wrong.