Adult echinoderms have radial symmetry. Sea urchins are echinoderms, in the same family as starfish. Adult sea urchins have radial symmetry.
This justifies what answer for what question? Q & A:
What has radial symmetry?
Options:
- (A) peachleaf willow
- (B) sea urchins
- (C) humans
- (D) gastropod shells
- (E) A Greek letter
- (F) asymmetry
- (G) dogs
- (H) Most plants
(B)