Blume Ch 12.2
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Sponges have little in common with other animals- probably _____ separately from all other animals. | evolved
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| Most sponges are asymmetrical and ________ | sessile
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| A sponge body is hollow ______ with one opening at the top and many small pores along the body tube | tube
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| Sponges have no tissues, organs, or organ systems; they often do have _______ | spicules
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| ________ for protection and support | spongin
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| Sponges pull microscopic food particles and oxygen in through their _______; wastes are removed through the opening at the top of the sponge. | pores
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| 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
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| ________ are invertebrates that include corals, sea anemones, jellyfish, hydras, and Portuguese man-of-wars | cnidarians
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| Most cnidarians live in _____ water; some live as individuals. while others live in colonies | salt
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| Most cnidarians have two body _____ | forms
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| They polyp is _______ - shaped and sessile | vase
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| the _______ is bell-shaped and free-swimming | medusa
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| Cnidarians have one body opening and _____ symmetry | radical
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| two cell layers are arranged into _______; a digestive cavity breaks down food | tissues
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| a ________ net carries impulses and connects all organism parts | nerve
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| most cnidarians have ______ with stinging cells to help capture food | tentacles
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| Cnidarians are __________ | predators
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| Cnidarians ________ both sexually and asexually | reproduce
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| Cnidarians have existed more than 6000 million years; mors of their fossils are_________ | corals
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| Coral reefs form as corals secrete their hard external _______ on those of earlier generations | skeletons
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| Coral reefs are _________ecosystems that protect shorelines from erosion | diverse
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| Coral reefs provide ___________ such as shells, pearls, and chemicals from human medical uses | recourses
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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