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jolli1 [7]
3 years ago
8

Oxygen was into ally created in earths atmosphere by___.

Biology
2 answers:
Mariulka [41]3 years ago
7 0
Here something that might help 
<span>
Most scientists believe that for half of </span>Earth's<span> 4.6-billion-year history, the</span>atmosphere<span> contained almost no </span>oxygen<span>. Cyanobacteria or blue-green algae became the first microbes to produce </span>oxygen<span> by photosynthesis, perhaps as long ago as 3.5 billion years ago and certainly by 2.7 billion years ago.</span>
kompoz [17]3 years ago
4 0
Blue-green algae........
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Blizzard [7]

Answer:

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Explanation:

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What can you do to ensure that you will continue to be motivated for the duration of your fitness program?
avanturin [10]
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3. You can make yourself motivated by watching fitness videos and basically watching things to get inspiration(trust me this works).After you watch the vids, your gonna want to keep going to the fitness program cause of all the benefits and things like that. 

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Those are the answers!

Hope this helps!

I am joyous to assist you anytime.

~Jarvis

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