Answer:
The proportion of oxygen went up because of photosynthesis by plants. The proportion of carbon dioxide went down because: it was locked up in sedimentary rocks (such as limestone) and in fossil fuels. it was absorbed by plants for photosynthesis.
Explanation:
Answer:
Urine is produced in the kidneys
Explanation:
Urine is a substance which is a mix of urea and water. Urea comes from the liver and other parts of the body but it is made into urine in the kidneys.
Hello!
Glad to tell you that you answer will be A.
Only Eukaryotic Cells have DNA which is stored inside of the nucleus. If the cell contains no DNA, then it has no need for a nucleus.
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Nope... I don't remember when it did but no
