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  • 25-05-2021
  • Biology
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List the three items that must be included in the definition of mass extinction

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Guee Guee
  • 25-05-2021
Ordovician-silurian Extinction: 440 million years ago.
Devonian Extinction: 365 million years ago.
Permian-triassic Extinction: 250 million years ago.
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