What is the source of oxygen produced during photosynthesis?

In the process of photosynthesis, oxygen is produced from the photolysis of water. The photolysis of water occurs when light is used to renew split water and adenosine triphosphate, also referred to as ATP. When plants convert light energy into chemical energy, it is called photosynthesis. read more

Autotrophs produce compounds during photosynthesis that they can later break down to form ATP. Heterotrophs must consume autotrophs or other heterotrophs to obtain the compounds that can be broken down to form ATP. ATP is needed by all cells to perform life processes. read more