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    Biology The Unity Diversity
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    Exam 19: Life's Origin and Early Evolution
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    Four of the Following Were Likely in Earth's Earliest Atmosphere
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Four of the Following Were Likely in Earth's Earliest Atmosphere

Question 30

Question 30

Multiple Choice

Four of the following were likely in Earth's earliest atmosphere.Which one was not?  


A) Hydrogen
B) Nitrogen
C) Oxygen
D) Carbon dioxide
E) Water vapor

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