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Scientists believe that the Earth's early atmosphere lacked __________ gas because photosynthetic organisms did not yet exist.

Scientists believe that the Earth's early atmosphere lacked __________ gas because photosynthetic organisms did not yet exist.
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Scientists believe that the Earth's early atmosphere lacked __________ gas because photosynthetic organisms did not yet exist.

User Luper Rouch
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the answer is C oxygen

User Zoha Ali Khan
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2 votes
The correct answer is oxygen
User Zakki
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