Lesson one-Animals without backbones
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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An animal without a backbone | invertebrate
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A simple invertebrate that has a hollow body with a single opening and lives in water | sponge
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An invertebrate with armlike parts and stinging cells on the ends of tentacles | cnidarian
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An invertebrate that has a soft body and a shell | mollusk
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A spiny-skinned invertebrate | echinoderm
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An internal supporting structure | endoskeleton
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An invertebrate with jointed legs, a body that is divided into sections and an exoskeleton | arthropod
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A hard covering that protects the bodies of some invertebrates | exoskeleton
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Broken up into 3 groups: flat, round and segmented | worms
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The largest group of invertebrates | arthropods
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The simplest kind of worm | flatworm
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has a thin body with pointed ends | roundworm
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a worm with a segmented body | segmented worm
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the simplest kind of invertebrate | sponge
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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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