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History, 29.08.2019 10:30 brianaponds01ow1c2g

What is a mass extinction?
a. when a single species is completely knocked out of existence
b. when catastrophic events lead to many deaths of a variety of species
c. when huge numbers of species die out in a short period to time
d. when huge numbers of species die out in a long period of time

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What is a mass extinction?
a. when a single species is completely knocked out of existence

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