EVOLUTION
THE ORIGIN OF LIFE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which of the following could NOT have been part of earth’s early atmosphere?
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Oxygen
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Water vapor
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Carbon Dioxide
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Methane
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Explanation:
Detailed explanation-1: -So the correct answer is ‘Oxygen’.
Detailed explanation-2: -Oxygen was absent in early earth atmosphere.
Detailed explanation-3: -Scientists broadly agree that Earth’s early atmosphere and oceans were all but devoid of oxygen gas. But there are signs that there was some oxygen around. Geochemists, for example, have found mineral deposits dated to about 3 billion years ago that they argue could only have formed in the presence of oxygen.
Detailed explanation-4: -Oxygen is produced by plants by the process of photosynthesis, earlier there were no plants and vegetation, which’s why no oxygen in the early atmosphere.
Detailed explanation-5: -Earths magnetosphere is not considered part of the atmosphere.
There is 1 question to complete.