Biology, asked by gautamkhatwani68, 4 months ago

Hard calcium carbonate structures
are used as skeleton by *
Echinodermata
Protochordata
Arthropoda
Nematoda​

Answers

Answered by amulyaphule25
0

Answer:

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

Answered by vanshitakataria05
0

Answer:

Explanation:

Echinodermata is the correct answer

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