Members of the ____ phylum have bilaterally symmetrical larvae, but exhibit secondary radial symmetry as adults, usually organized around five rays, or "arms."

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Echinoderms, belonging to the phylum Echinodermata, are known for their unique developmental pattern where they start life with bilateral symmetry as larvae and then develop into adults with a distinctive radial symmetry, often organized around five rays or arms. This group includes starfish, sea urchins, and sea cucumbers.

Members of the ____ Phylum Have Bilaterally Symmetrical Larvae, but Exhibit