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Clay Skiles
Blume Chapter 12.2
| Question | Answer |
|---|---|
| Sponges have little in common with other animals- they probably____________ separately from all other animals. | evolved |
| Most sponges are asymmetrical and ____________. | sessile |
| A sponge body is a hollow ______ with one opening at the top and many small pores along the body tube. | tube |
| Sponges have no tissues, organs, or organ systems; they often do have _____________ or ____________ for protection and support. | spicules; spongin |
| Sponges pull microscopic food particles and oxygen in through their ________; wastes are removed through the opening at the top of the sponge. | pores |
| Most sponges are ______________________ that produce both sperm and eggs, though sponges cannot fertilize their own eggs; sponges can also produce asexually by budding or regeneration. | hermaphrodites |
| __________________ are invertebrates that include corals, sea anemones, jellyfish, hydras, and Portuguese man-o-wars. | Cnidarians |
| Most cnidarians live in ________ water, some live as individuals, while others live in colonies. | salt |
| Most cnidarians have two body ________. | forms |
| The polyp is _______-shaped and sessile. | vase |
| The __________ is bell-shaped and free-swimming. | medusa |
| Cnidarians have one body opening and ___________ symmetry. | radial |
| Two cell layers are arranged into ______________; a digestive cavity breaks down food. | tissues |
| A ______ net carries impulses and connects all organism parts. | nerve |
| Most cnidarians have __________________ with stinging cells to help capture food. | tentacles |
| Cnidarians are ______________. (These types of creatures destroy and devour their food) | predators |
| Cnidarinans ______________ both sexually and asexually | reproduce |
| Cnidarians have existed more than 600 millions years; most of their fossils are ____________. | corals |
| Coral reefs form as corals secrete their hard external ________________ on those of earlier generations. | skeletons |
| Coral reefs are _____________ ecosystems that protect shorelines from erosion. | diverse |
| Coral reefs provide ______________ such as shells, pearls, and chemicals for human medical uses. | resources |
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cskiles
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