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Which one of the following statements is...

Which one of the following statements is not correct?

A

All echinoderms are viviparous.

B

Roundworm has no circulatory system.

C

In body fishes, swim bladder is usually present.

D

In cartilaginous fishes, fertilization is internal.

Text Solution

Verified by Experts

The correct Answer is:
A
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