Bio 2 Origins
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9 Terms
1
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age of universe
14 Ga
2
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precambrian era
4.6 Ga- 540 Ma
3
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formation of earth
4567 Ma
4
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molecular signs of life
3700 Ma
5
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oxygen catastrophe
2500 Ma
6
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multicellular animals
1000 Ma
7
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multicellular plants
900 Ma
8
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cambrian explosion
542 Ma
9
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dinosaurs and mammals
200 Ma
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Flashcards (20)