| A | B |
|---|
| radial symmetry | many lines of symmetr through a central point |
| bilateral symmetry | a line that divides an object in half that are mirror images |
| phylum | 35 major groups in theanimal kingdom |
| heterotroph | must obtain food by eating |
| autotroph | makes its own food |
| sponge | Porifera |
| cnidarians | polyps and medusa |
| collar cells | whiplike structures that move water through the sponge |
| regeneration | ability to regrw body parts |
| flatworm | Platyhelminthes |
| roundworms | Nematoda |
| segmented worms | Annelida |
| parasite | obtain their food from a host |
| coral | cnidarians with hard skeletons around their soft bodies |
| segmented worms | have a closed circulatory system |
| animals | need food,water and oxygen |
| earthworms | loosen and fertilize soil |
| One way digestive system | roundworms and segmented worms |
| planarian | food and waste enter an leave through the mouth |
| adaptation | a characteristic that helps an animal survive in its environment |
