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

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Biology

Braeden Stout

20 March, 14:24

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

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Myles Simmons · 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.