I think it's Photosynthesis because photosynthetic bacteria began producing excess oxygen, which added oxygen to the Earth's atmosphere.
Answer:
A. A cell
Explanation:
Cells are the building blocks of life.
They are the biological units of organisms and are the basic structural and functional units of life.
Cells are the smallest units of life.
I don't see your article, but one pollutant, CFC, is used in refrigerators and aerosols. Please mark Brainliest!!!
Answer:
These results show that the body regulates its salt and water balance not only by releasing excess sodium in urine, but by actively retaining or releasing water in urine. The advantage of this mechanism is that the long-term maintenance of body fluids isn't as dependent on external water sources as once believed.
If we do not take in a certain amount of amino acids, we would not be able to make some proteins that are needed for the body. It would not mean all proteins wouldn’t be made, but if you are missing one essential amino acid it would lead to one type of protein not being made
