The early atmosphere of the earth probably consisted of carbon dioxide, water vapor, and nitrogen, with little
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The early atmosphere of the earth probably consisted of carbon dioxide, water vapor, and nitrogen, with little free oxygen. What is believed to be the source of oxygen in the present-day atmosphere? What bearing has this question on the relatively rapid development of varied and complex forms of life that marks the start of the Paleozoic Era?
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Most of the oxygen in the atmosphere was probably produced by photosynt...View the full answer
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