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halle Hudson
Blume Ch 12.2
Question | Answer |
---|---|
Sponges have little in common with other animals- probably _____ separately from all other animals. | evolved |
Most sponges are asymmetrical and ________ | sessile |
A sponge body is 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 _______ | spicules |
________ for protection and support | 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 sperms and eggs, though sponges cannot fertilize their own eggs; sponges can also reproduce asexually by budding or regeneration | hermaphrodites |
________ are invertebrates that include corals, sea anemones, jellyfish, hydras, and Portuguese man-of-wars | cnidarians |
Most cnidarians live in _____ water; some live as individuals. while others live in colonies | salt |
Most cnidarians have two body _____ | forms |
They polyp is _______ - shaped and sessile | vase |
the _______ is bell-shaped and free-swimming | medusa |
Cnidarians have one body opening and _____ symmetry | radical |
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 __________ | predators |
Cnidarians ________ both sexually and asexually | reproduce |
Cnidarians have existed more than 6000 million years; mors 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 from human medical uses | recourses |