Which of the following is/are not (a) characteristic feature(s) of Phylum Hemichordata?

Respiration through gills

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Closed circulatory system

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Bilateral symmetry

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Notochord

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Solution

The correct options are
B Closed circulatory system
D Notochord
Phylum Hemichordata includes marine worm-like animals. They possess an open type of circulatory system, respire through gills and exhibit bilateral symmetry. They do not possess a notochord; this is present only in chordates. They are thus, placed under non-chordates and not under Phylum Chordata.

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