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Home Q & A Board Science-Related Homework Help Physics Astronomy
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hermiz hermiz
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7 years ago
The most severe mass extinction during the past 500 million years occurred at the end of which geological period?
A) Devonian
B) Triassic
C) Permian
D) Cretaceous
Textbook 
Life in the Universe

Life in the Universe


Edition: 4th
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Life in the Universe, 4/E (Bennett, Shostak)
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DonskoyDonskoy
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7 years ago
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hermiz Author
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7 years ago
Smart ... Thanks!
branbran2k16
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Yesterday
I appreciate what you did here, answered it right Smiling Face with Open Mouth
prime7105
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2 hours ago
Helped a lot
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