what is photosynthesis
Answers
Photosynthesis is the process by which green plants and some other organism used sunlight to synthesise nutrients from carbon dioxide and water.
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Answer:
Photosynthesis
Photosynthesis is the process by which plants, some bacteria and some protistans use the energy from sunlight to produce glucose from carbon dioxide and water. This glucose can be converted into pyruvate which releases adenosine triphosphate (ATP) by cellular respiration. Oxygen is also formed.
Photosynthesis may be summarised by the word equation:
carbon dioxide + water arrow with sunlight and chlorophyll glucose + oxygen
The conversion of usable sunlight energy into chemical energy is associated with the action of the green pigment chlorophyll.
Chlorophyll is a complex molecule. Several modifications of chlorophyll occur among plants and other photosynthetic organisms. All photosynthetic organisms have chlorophyll a. Accessory pigments absorb energy that chlorophyll a does not absorb. Accessory pigments include chlorophyll b (also c, d, and e in algae and protistans), xanthophylls, and carotenoids (such as beta-carotene). Chlorophyll a absorbs its energy from the violet-blue and reddish orange-red wavelengths, and little from the intermediate (green-yellow-orange) wavelengths.