Physics, 15.10.2019 06:30, cornpops1749

The deadliest of all mass extinctions, which killed off 95% of all living organisms, was the
a).cretaceous-tertiary
b).end triassic
c).permian-triassic
d).late devonian
e).ordovician-silurian

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The deadliest of all mass extinctions, which killed off 95% of all living organisms, was the
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