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

User Mick F
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2 Answers

4 votes

Answer:

Oxygen

Step-by-step explanation:

took the test on k12

User JAkk
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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!
:)
User Saurabh Rathod
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6.7k points
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