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fiionalynn
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The end of the paleozoic era was signaled by

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cupcake2d

The correct answer for the question that is being presented above is this one: "B. mass extinction of land and sea animals." The end of the paleozoic era was signaled by mass extinction of land and sea animals. Here are the following choices: A. the development of humans B. mass extinction of land and sea animals C. the development of organisms with hard parts D. both a and b

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