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Science
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Echinoderms are marine invertebrates.
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Age 9-11
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level: 6
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English
Author's Instructions
Echinoderms have external skeletons, a nervous system, and they are covered with spines.
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Science
-
Echinoderms are marine invertebrates.
-
Age 9-11
-
level: 6
-
English
Author's Instructions
Echinoderms have external skeletons, a nervous system, and they are covered with spines.