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Question

An animal having unsegmented coelom, superficial radial symmetry in adult but bilateral symmetry in larva is member of

A
Mollusca
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B
Echinodermata
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C
Athropoda
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D
Annelida
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Solution

The correct option is B Echinodermata
The larvae of echinoderms have bilateral symmetry but this is lost during metamorphosis when their bodies are reorganised and develop the characteristic unsegmented coelom superficial radial symmetry of the echinoderm. Hence, option B is correct answer.

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