| A | B |
|---|
| All the members of Kingdom Animalia are | heterotrophs |
| Worms and insects are both | vertebrates |
| Many small aquatic animals rely on ________ to transport oxygen, nutrients, and waste products among their cells. | diffusion |
| Sponges are ________, meaning they live their entire adult lives attached to a single spot. | motile |
| In a sponge, some functions are carried out by specialized | tissues |
| Cells called __________ move water currents through a sponge. | gemmules |
| Sponges are important in marine ecology because they provide ______ for some marine animals. | habitats |
| ____________ containing nematocysts are a characteristic associated only with cnidarians. | Choanocytes |
| Cnidarians have a central _________ surrounded by numerous tentacles. | mouth |
| ________are a body form of cnidarians that are motile. | Polyps |
| __________ are the simplest animals to have three embryonic germ layers. | Roundworms |
| Undigested material leaves a roundworm's body through the _________. | anus |
