PHOTOSYNTHESIS:
Photosynthesis is a proces in which the green parts of a palnt, mostly leaves manufacture food materials from carbon dioxide and water in the presence of sunlight. Photosynthesis is the ultimate source of food that we eat and the oxygen that we breathe.
Plants absorb water from the soil by root hairs and carbon dioxide through the atmosphere by stomata. Chlorophyll absorbs light energy from sunlight and intiates the process. The sun energy activates chlorophyll and the activated chlorophyll transfers the sun energy into chemical energy in the form of ATP and NADPH2. This chemical energy provides the energy for the second step of photosynthesis. The whole process of photosynthesis envolves a number of chemical reactions each under the action os a specific enzyme, leading finally to formation of glucaose and oxygen is released as a by-product. Photosynthesis is vital to life on earth since all animals are directly or indirectly dependentant on plants for their food and survival.
