Biology, 22.08.2019 08:30, Ayakouhail1
Which mixture of gases is thought to have made up earth's early atmosphere? a. methane, oxygen, hydrogen, water vapor b. carbon dioxide, nitrogen, oxygen, ozone c. hydrogen, water vapor, ammonia, methane, carbon dioxide d. ozone, water vapor, carbon dioxide, ammonia
Answers: 2
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Which mixture of gases is thought to have made up earth's early atmosphere? a. methane, oxygen, hyd...
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