macroevolution!!!! Flashcards by Emily Baker

Q

Timeline of 4 eras BP

A

precambrian (4600 - 540)

Paleozoic (540-252)

Mesozoic (252-66)

Cenozoic (66-0)

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Q

Firs big catastrophe

A

Oxygenation event

anaerobic world flipped to primarily aerobic

2.4 bya

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Q

A

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