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Question

Closed type of circulatory system is seen in (  ) 
A) cephalochordates
B) annelids
C)echinoderms 
D) all of these


Solution

All ot the above


Most vertebrates and some invertebrates, such as this annelid earthworm

Cephalocordates and echinoderm  are sub phylum of cordates

Chordates are eucoelomate deuterostomes, and probably share a common ancestor with echinoderms.

Chordates are eucoelomate deuterostomes, and probably share a common ancestor with echinoderms.

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