thebest55 thebest55

22-04-2018
Biology

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When the Earth First developed there was no oxygen. The first living organism,cyanobacterica,added oxygen to the Earth.Explain why this is was important and What it helped to create on the Earth in order to protect living organisms

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GoldDiamond2006 GoldDiamond2006

22-04-2018

Its important because people would not be able to breathe so they would by dead,and it helped to create everything in the world

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