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Title: The primitive Earth's atmosphere did NOT contain Post by: Groanier on Mar 31, 2018 The primitive Earth's atmosphere did NOT contain
a. free oxygen. b. free nitrogen. c. free hydrogen. d. water vapor. e. inert gases. Question 2 The metabolic reactions that occur in all cells require a certain molecule that was also believed to be present very early on Earth. What is this molecule? a. nitrogen b. carbon c. water d. oxygen e. hydrocarbon Title: The primitive Earth's atmosphere did NOT contain Post by: kzabec on Mar 31, 2018 Content hidden
Title: The primitive Earth's atmosphere did NOT contain Post by: Groanier on Mar 31, 2018 Oh god, I was lost before coming here. Thanksss
Title: The primitive Earth's atmosphere did NOT contain Post by: kzabec on Mar 31, 2018 Great, make sure you mark the topic solved, it hides it from other eyes :)
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