Chemistry, 11.03.2021 21:50 trvptierra

Which one of the following is NOT a mass extinction? * O The Permian-Triassic event
O The K-T event
O The Cambrian Explosion
O The Ordovician-Silurian event

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Which one of the following is NOT a mass extinction? * O The Permian-Triassic event
O The K-T...