A conversion disorder is a relatively uncommon mental disorder in which a person has physical symptoms that no medical condition, physical examination or testing can explain. The person is not faking.. The symptoms do not appear to be under the person's conscious control and they can cause significant distress.
The most important chemical reaction of all is photosynthesis. At first I thought that the most important reaction was respiration, the set of reactions in our cells that keeps us alive by combining glucose with oxygen and provides the energy that keeps us alive. Then I realized that we would not be alive without the oxygen in the first place.
Photosynthesis is the conversion of light energy into chemical energy by living organisms. The raw materials are carbon dioxide and water, the energy source is sunlight, and the end-products include glucose and oxygen. It is arguably the most important biochemical pathway,[1] since nearly all life depends on it. It is a complex process occurring in higher plants, phytoplankton, algae, as well as bacteria such as cyanobacteria.