Two reasons: Aspirin has a direct potentially erosive effect on the stomach lining causing the lining to become inflamed , especially on an empty stomach and thus can contribute to creation or perpetuation of a breach in the stomach lining (an ulcer).
Photosynthesis is a process used by plants in which energy from sunlight is used to convert carbon dioxide and water into molecules needed for growth. These molecules include sugars, enzymes and chlorophyll.
1 It can be converted into chemicals required for growth of plant cells such as cellulose. 2  It can be converted into starch, a storage molecule, that can be converted back to glucose when the plant requires it.  It can be broken down during the process of respiration, releasing energy stored in the glucose molecules.