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madam [21]
3 years ago
9

According to scientific evidence, earth’s earliest atmosphere lacked oxygen. Over time, oxygen was added to the atmosphere.

Biology
1 answer:
iVinArrow [24]3 years ago
7 0
B and a are the correct answers
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kirill115 [55]

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Damian here!(ノ◕ヮ◕)ノ*:・゚✧

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so its basically passive

Hope this helps? :))

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