Question

why echinoderms have radial symmetry in adults but bilateral symmetry in larvae​

Answer 1

Answer:

Starfish also possess the Hox gene cluster, which controls symmetrical development. Overall, echinoderms are thought to have a bilateral developmental mechanism and process. ... These behavioral bilateral tendencies might be related to the A/P axis during the embryonic development of the starfish.Ja

Answer 2

Although adult echinoderms possess pentaradial, or five-sided, symmetry, echinoderm larvae are ciliated, free-swimming organisms that organize in bilateral symmetry which makes them look like embryonic chordates. Later, the left side of the body grows at the expense of the right side, which is eventually absorbed