photosynthesis is a kind of chemical reaction
photochemical_reaction is chemical_reaction. photosynthesis is process. photosynthesis is synthesis. photosynthesis_in_sulfur_bacteria is chemical_reaction. photosynthesis is photo_chemical_process. photosynthesis_in_plants is endergonic_reaction. photosynthesis is chemical_process. photorespiration is chemical_reaction. general_photosynthesis is biochemical_synthesis. chemical_decomposition is chemical_reaction.