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Hard calcium carbonate structures are us...

Hard calcium carbonate structures are used as skeleton by

A

Echinodermata

B

Protochordata

C

Arthropoda

D

Nematoda

Text Solution

Verified by Experts

The correct Answer is:
A
Body wall of echinodermata is covered with spiny, hard, calcareous (calcium carbonate) plates (ossicles) that form a rigid or flexible endoskeleton.
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