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Question
Which among the following contains hard calcium carbonate structures as the constituent part of their skeleton?
Which among the following contains hard calcium carbonate structures as the constituent part of their skeleton?
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Solution
The correct option is A Echinodermata
∙ The echinoderms are spiny-skinned organisms, which are exclusively free-living and marine. They are triploblastic and coelomate.
∙ They have a water-driven tube system for locomotion.
∙ The body consists of calcium carbonate structures that they use as skeletons.
E.g., Sea urchins, starfish.
∙ The echinoderms are spiny-skinned organisms, which are exclusively free-living and marine. They are triploblastic and coelomate.
∙ They have a water-driven tube system for locomotion.
∙ The body consists of calcium carbonate structures that they use as skeletons.
E.g., Sea urchins, starfish.
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