| A | B |
|---|
| animals without a backbone | invertebrates |
| body parts arranged in a circle like a wheel hub | radial symmetry |
| remains attached to one place for life span | sessile |
| located on inside of sponge; help water movement | collar cells |
| replacing body parts | regeneration |
| animals that produce both sperm and eggs | hermaphrodites |
| young organism | larva |
| body plan that is shaped like a tube or vase | polyp |
| body plan that is bell-shaped | medusa |
| young worm with a protective covering | cyst |
