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Question

Absence of head, unsegmented body and endoskeleton of dermal calcarous plate are the characters of

A
Mollusca
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B
Arthropoda
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C
Echinodermata
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D
None of the above
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Solution

The correct option is C Echinodermata
Echinoderms have a primitive nervous system with no brain. They do not have a head or tail end. They have unsegmented radially symmetrical body, covered by a thin epidermis beneath which is a firm endoskeleton of plates of calcium carbonate. Hence, option C is correct.

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