Echinoderms are more closely related to vertebrates than they are to other invertebrates such as arthropods and annelids because... _____________
1 they have similar larval stages.
2 they are triploblastic.
3 they are deuterostomes.
4 they have a complete digestive tract.
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Answer:they are triploblastic
Explanation:It may be correct
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Answer:
They are triploblastic.
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