Simply, photosynthesis is a process that occurs in plants and some bacteria where light energy and other substances like carbon dioxide react with one another to produce a form of energy, while at the same time releasing oxygen. The relationships between living biological systems and plants that produce oxygen have a relationship similar to mutualism. Living organisms release carbon dioxide which is required for plants to process photosynthesis, and in return oxygen is produced (Sutherland 2015). Without photosynthesis, there would be a dramatically decrease in the amount of oxygen present. After all, photosynthesis is one of the dominant sources for oxygen.
The process of photosynthesis is actually very complex at the cellular level. Two common details about photosynthesis are that it produces sugar and oxygen. A study by Grondellea and Novoderezkinb (2011) showed that there are two regions where the process of photosynthesis occur called the photosystem I and photosystem II. In the photosystem I, light energy along with NADPH and ATP is used to produce sugar. While in photosystem II, oxygen is produced when negative charged subatomic particles are dissociated from water by the use of light energy (Grondellea and Novoderezhkinb