By which developmental similarity are Echinod | vedclass

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(D) Echinoderms and Chordates are both classified as Deuterostomes. In Deuterostomes,the blastopore (the first opening formed during embryonic develop

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Coelom

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(D) Echinoderms and Chordates are both classified as Deuterostomes. In Deuterostomes,the blastopore (the first opening formed during embryonic development) develops into the anus,while the mouth develops from a secondary opening. This pattern of embryonic development,specifically the formation of the coelom (enterocoelous) and the fate of the blastopore,indicates a close evolutionary relationship between Echinoderms and Chordates.

By which developmental similarity are Echinoderms related to Chordates?

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