The deadliest of all mass extinctions, which killed 95% of all living organisms, was the _____.
1. Cretaceous-Tertiary
2. End Triassic
3. Permian-Triassic
4. Late Devonian
5. Ordovician-Silurian
The deadliest of all mass extinctions, which killed 95% of all living organisms, was the Permian-Triassic.
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Asked 10/30/2013 7:43:14 AM
Updated 2/21/2018 8:46:06 AM
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