Ancient chordates are thought to be most closely related to echinoderms because the embryos of chordates and echinoderms are

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Biology

Laylah Acevedo

10 January, 06:58

Ancient chordates are thought to be most closely related to echinoderms because the embryos of chordates and echinoderms are

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Micaela Dillon · Answer 1

The answer is sea stars. Sea stars can then push their stomachs out of the body while inserting it into the prey thus the food is being digested externally. Echinoderms are having 5 or at times multiple of 5 arms. Their shell is made of calcium carbonate.