According to a source the answer is <span><u>Cyanobacteria were the first organisms to produce oxygen in water, which then escaped into the atmosphere.</u>
These cyanobacteria species were the first ones to "produce" oxygen as a by-product of the photosynthetic mechanisms which enables organisms to make their own food. </span>
Yes I am in a good job and I’m so stressed and stressed I need
Difficult to change - nutrients! crops won’t grow on soil that has had all of the nutrients used up. example: after growing corn in the same place for 50 years, corn will not grow anymore because all of the nutrients it needs to grow will no longer be in the soil
The right option is; Absorption
Transport of a substance from the lumen (cavity) of an organ into one side of a cell and out the other side of the cell into the ecf is called absorption.
Absorption is the process of assimilating substances into cells or through the tissues and organs. Absorption is done through osmosis or diffusion. Absorption of substances takes place within the body such as the absorption of drugs into the bloodstream, and the absorption of nutrients by the digestive system.
