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3 May, 11:01

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.

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  1. 3 May, 11:25
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    Since the early vertebrates were composed of cartilage instead of bone, the characteristic that cartilage shares with notochords is that it is soft and flexible. The correct answer is B, it is soft and flexible.
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