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 symmetrical and _______ | sessile.
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| A sponge body is a hollow _____ with one opening at the top & many small pores along the body tube | tube
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| Sponges have no tissue, organs, or organ systems; they often do have ______ or ______ for protection & support. | spicules or spongin
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| Sponges pull microscopic food particles & 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 sperm & 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, jelly fish, hydras, & Portugese 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 _____ | form
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| The polyp is ______-shaped & sessile | vase
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| The ______ is bell-shaped & free-swimming | medusa
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| Cnidarians have one body opening & ______ symmetry. | radial
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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 & asexually. | produce
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| Cnidarians have existed more than 600 million years; most 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 provide _______ such as shells, pearls, & chemicals for humans. | resources
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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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