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why are enhinoderms and cnidarians are more closely related than enchinoderms and mammals

Sagot :

Answer:

Because they are triploblastic ( Triblastica ).

Explanation:

Their body is composed of endoderm, mesoderm and ectoderm. While Cnidaria are Diblastica, so they are composed only from two layers: endoderm and ectoderm.

In addition larvae of Echinoderms are bilaterally symmetrical and they become nearly-radial only as adults.