Life is believed to have begun 3 5 million years ago During this time, which of the following gases did the atmosphere on primitive Earth lack (A) Oxygen (B) Carbon dioxide (C) Ammonia (D) Methane Atmosphere's content ( ) 100 75 50 25 Amonia, Methane Water Vapor H He Carbon Dioxide 0 4 6 4 Hadean 3...

Life is believed to have begun 3.5 million years ago. During this time, which of the following

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Life is believed to have begun 3.5 million years ago. During this time, which of the following gases did the atmosphere on primitive Earth lack? Atmosphere's content (%) 100 75 50 25 Amonia, Methane Water Vapor H He Carbon Dioxide 0 4.6 4 Hadean 3

(A) Oxygen
(B) Carbon dioxide
(C) Ammonia
(D) Methane

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The Princeton Review AP Biology Premium Prep 2023

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Life is believed to have begun 3.5 million years ago. During this time, which of the following

Question:

Atmosphere's content (%) 100 75 50 25 Amonia, Methane Water Vapor H₂ He Carbon Dioxide 0 4.6 4 Hadean 3 Archean Nitrogen 2 1 Time (billion years) Oxygen Present Proterozoic Phanerozoic

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