Echinoderms and chordates are thought to be more closely related that other phyla are to these groups because ____.

Name: Echinoderms and chordates are thought to be more closely related that other phyla are to these groups because ____.
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Echinoderms and chordates are more closely related because they both have embryonic cells with radial cleavage, which is a unique characteristic not found in other phyla. This suggests a common ancestor that diverged from other lineages early in animal evolution.

Echinoderms and Chordates Are Thought to Be More Closely Related