The astronomical unit, otherwise known as AU is used to measure long distances in the universe.
In photosynthesis oxygen is released to the atmosphere which means the third option is correct.
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The scrotum functions to keep the testes at an optimum temperature
The answer is "A" Cromosomes
Answer:
I believe that the first one is sea level, and second is lowest at a higher altitude. Not entirely sure. Let me know if it's right.
