Description: The addition of oxygen into Earth's atmosphere by cyannobacteria led to the creation of banded iron formations. Oxygen was poisonous to life at that time. Once cells could utilize oxygen, they had much more energy at their disposal.
Keywords: burning, house, addition, oxygen, earth, atmosphere, cyannobacteria, led, creation, banded, iron, formations, poisonous, life, time, cells, utilize, energy, disposal
Created by: Glenn Dolphin Added: 2005-09-01
Earth Science (Earth History and Geologic Time) Views: 1870
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