Assertion: starfish's symmetry | /r/HasProperty | derived
Facets:
value: during embryological development
type: TEMPORAL
value: during evolutionary history
type: TEMPORAL
value: secondarily
type: DEGREE
Source sentences:
text: Echinoderms were once grouped with cnidarians and ctenophores because of their radial symmetry, but it was later discovered that the radial symmetry of echinoderms is secondarily derived, both during embryological development and evolutionary history.
text: The starfish can begin the metamorphosis into an adult once its characteristic radial symmetry is developed.