Endoskeleton of Echinoderms is made of__________.

Silica

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Lime

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Chitin

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Cartilage

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Solution

The correct option is B Lime
Echinoderm skeletons are made up of interlocking calcium carbonate plates and spines. This skeleton is enclosed by the epidermis and is thus an endoskeleton.
So, option B is the correct option.

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