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Home Q & A Board Science-Related Homework Help Geography and Earth Sciences
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yxc47 yxc47
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6 years ago

The mass extinction in the geologic record, which proved to be the most devastating to life on Earth, occurred at the
  end of the ____.
  a. Cambrian
  b. Cretaceous
  c. Devonian
  d. Ordovician
  e. Permian
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Jmassey95Jmassey95
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6 years ago
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yxc47 Author
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6 years ago
this is exactly what I needed
gefa
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Yesterday
Brilliant ツ
jbag1237
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2 hours ago
This site is awesome
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