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Get Answers to all your Questions
Hard calcium carbonate structures are used as skeleton by
(a) Echinodermata
(b) Protochordata
(c) Arthropoda
(d) Nematoda
Answers (1)
Answer- (a) Echinodermata
Sea urchin belongs to the phylum Echinodermata. These are spiny-skinned organisms found in marine water. They are triploblastic and have a coelomic cavity. They produce calcium carbonate plates that fit together tightly.
Hence, the correct option is a) Echinodermata
View full answer
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