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Embryological evidence suggests that the echinoderms are closely related to the ______________. arachnids annelids arthropods chordates

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Echinoderm is the name given to a member of the phylum Echinodermata. They have radial symmetry and this includes sea urchins, sand dollars, sea stars and sea cucumbers. It is suggested that they are related to the chordates which is the answer.

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