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(HELP QUICK!!) Earth's atmosphere was primarily composed of _______ until the Proterozoic era A. Oxygen B. Nitrogen C. Methane D. Carbon Dioxide
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Dec 22, 2020
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(HELP QUICK!!) Earth's atmosphere was primarily composed of _______ until the Proterozoic era
A. Oxygen
B. Nitrogen
C. Methane
D. Carbon Dioxide
Biology
middle-school
Deandra
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Deandra
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Answer:
C. Methane is the answer
Robou
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Dec 22, 2020
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Robou
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Answer:
methane
Step-by-step explanation:
Jeroen Van Malderen
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Dec 28, 2020
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Jeroen Van Malderen
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