it is believed that Earth atmosphere before origin of life was consisted of a mixture of
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Answer:Before life began on the planet, Earth's atmosphere was largely made up of nitrogen and carbon dioxide gases. After photosynthesizing organisms multiplied on Earth's surface and in the oceans, much of the carbon dioxide was replaced with oxygen.
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Evolution of the atmosphere
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J.M. Hayes
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Evolution of the atmosphere, the development of Earth’s atmosphereacross geologic time. The process by which the current atmosphere arose from earlier conditions is complex; however, evidence related to the evolution of Earth’s atmosphere, though indirect, is abundant. Ancient sediments and rocks record past changes in atmospheric composition due to chemical reactions with Earth’s crust and, in particular, to biochemical processes associated with life.
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