Geography
Geography, 27.09.2019 21:30, towlesam

What event marks the end of both the paleozoic era and mesozoic era?

a. the ice age

b. the appearance of birds

c. a mass extinction of plants and animals

d. the breakup of a supercontinent

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What event marks the end of both the paleozoic era and mesozoic era?

a. the ice age

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