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

(not a)

Answer 2

C

Answer 3

Hmm, I think it is not A and not C either. Which is why we encourage people to post explanations as well as answers.

Answer 4

D is wrong because were talking about bones and stuff so it has to be B so just use the process of elimanation to get the anwser :)

Answer 5

its b