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gogolik [260]
3 years ago
11

I need the answer ASAP

Biology
2 answers:
LekaFEV [45]3 years ago
5 0

Answer:

A

Explanation:

Nitella [24]3 years ago
3 0

Answer: During one year a population of blue jays has zero population growth. Which must be true about the blue jay population at the end of the year compared to the beginning of the year? It will have the same number of individuals in it.

Explanation:

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Here something that might help 
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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>
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