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tyressjones tyressjones
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7 years ago
The organisms originally responsible for putting oxygen in Earth's atmosphere lived around
A) 1.5 million years ago.
B) 2.3 billion years ago.
C) 3.5 million years ago.
D) 3.5 billion years ago.
E) 6 billion years ago.
Textbook 
Biology: Life on Earth

Biology: Life on Earth


Edition: 10th
Authors:
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kont24kont24
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Posts: 1328
7 years ago
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tyressjones Author
wrote...
6 years ago
Yes! Correct again Slight Smile
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