Biology, 07.11.2019 19:31 JANA279

Which of the following gases were present in the atmosphere of 4 billion years ago?

a) water
b) methane
c) ammonia
d) all of the above

Answers: 1

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Which of the following gases were present in the atmosphere of 4 billion years ago?

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Which of the following gases were present in the atmosphere of 4 billion years ago? a) water b) methane c) ammonia d) all of the above

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Another question on Biology

Which of the following gases were present in the atmosphere of 4 billion years ago?

a) water
b) methane
c) ammonia
d) all of the above