Identify the correct statement of Echinoderms.
I. The phylum to lack any fresh water or terrestrial representatives.
II. Constitutes the only major group of invertebrates.
III. Are triploblastic animals.
IV. Have direct development without any larval stage.
Choose the correct option.

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II and IV

IV and III

I and III

II and III

answer is B.

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Detailed Solution

Echinoderms are spiny skinned animals, exclusively marine free-living organisms, possess specialized water vascular system for locomotion and feeding. E.g., Holothuria atra, Antedon sp., Asterias sp., Colobocentartus atratus and Echinus sp. etc.

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