Biology, 12.04.2020 03:19 kp2078

6. How did Earth's atmosphere change during Precambrian time?
O The amount of oxygen increased greatly.
O Precambrian oxygen was quickly used up by algae and plants.
O The amount of carbon dioxide increased.
Torrential rains never reached the surface until the Paleozoic era.

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6. How did Earth's atmosphere change during Precambrian time?
O The amount of oxygen increased...