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Before there was any life on earth, which gas was absent from earth’s ancient atmosphere? A. nitrogen B. ammonia C. oxygen D. methane

Before there was any life on earth, which gas was absent from earth’s ancient atmosphere? A. nitrogen B. ammonia C. oxygen D. methane
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Before there was any life on earth, which gas was absent from earth’s ancient atmosphere? A. nitrogen B. ammonia C. oxygen D. methane

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User Mick F
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2 Answers

4 votes

Answer:

Oxygen

Step-by-step explanation:

took the test on k12

answered
User JAkk
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7.8k points
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Easy. Answer is oxygen because it says which one was missing before any life was on earth. And in order to have life on earth you need oxygen!
:)
answered
User Saurabh Rathod
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8.2k points
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