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OpenStudy (anonymous):

The largest mass extinction of the Paleozoic Era was: at the end of the Cretaceous at the end of the Permian at the middle of the Jurassic extinctions never happened

OpenStudy (nincompoop):

end of Permian

OpenStudy (anonymous):

Middle of Jurassic

OpenStudy (nincompoop):

@rickGGJR Jurassic during Mesozoic. That makes it a wrong answer.

OpenStudy (anonymous):

jurrassic

OpenStudy (nincompoop):

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