why is echinoderms more closely related to chordates than invertebrates ???
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Echinoderms are closer to Chordates than any other phylum:
Echinoderms are closer to Chordates than any other phylum:During embryonic development, the first aperture that is formed in deuterostomes is a primitive anus. Alternatively, in protostomes the first aperture, also known as a blastopore, develops to form the mouth.
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