Answer:
1.
1.Light or photochemical reactions.
They require the presence of sunlight, which is transformed into chemical energy usable by organisms in the form of ATP, these reactions occur in thylakoids, and for their more detailed study, photochemical reactions are classified as cyclic photophosphorylation and non-cyclic photophosphorylation.
2.Carbon fixation reactions or reactions in the dark.
They require or not the presence of sunlight, and they are reactions that will occur in the stomata.
3.Chemosynthesis.
They take inorganic compounds and O2 from the environment and combine them inside their cells and as a result of these reactions energy is released (exergonic reactions) applying it in the synthesis of ATP (endergonic reactions), forming inorganic by-products.
Biological importance of photosynthesis:
Photosynthesis is surely the most important biochemical process in the biosphere for several reasons:
1. Every year some 200,000 million tons of carbon is used in the photosynthetic process.
2. The synthesis of organic matter from inorganic is carried out mainly through photosynthesis; that will go from some living beings to others through the food chains.
3. Produces the transformation of light energy into chemical energy, necessary and used by living beings.
4. Oxygen is released, which will be used in aerobic respiration as an oxidant.
5. It is the cause of the change produced in the primitive atmosphere, which was Anaerobic and reductive.
6. The energy stored in fossil fuels such as Coal, Oil, and Natural Gas also depends on it.
7. It is responsible for maintaining the necessary balance between Autotrophic and Heterotrophic beings.
8. During the process, dioxygen is released into the atmosphere, which implies:
