DENDROLOGY

Detailed explanation-1: -Sunlight is necessary for photosynthesis, the sun provides the initial energy that starts the cycle of photosynthesis The energy from the light causes a chemical reaction that breaks down the molecules of carbon dioxide and water and reorganizes them to make the sugar (glucose) and oxygen gas.

Detailed explanation-2: -During photosynthesis, carbon dioxide, a gas, is combined with water and solar energy, and converted to carbohydrates, a solid. Formation of carbohydrates is a chemical way to store the sun’s energy as “food.” Carbohydrates produced from photosynthesis provide energy for all plant growth and maintenance.

Detailed explanation-3: -During the process of photosynthesis, light penetrates the cell and passes into the chloroplast. The light energy is intercepted by chlorophyll molecules on the granal stacks. Some of the light energy is converted to chemical energy. During this process, a phosphate is added to a molecule to cause the formation of ATP.

Detailed explanation-4: -Plants use simple inorganic substances such as carbon dioxide, water and sunlight to produce complex organic substances such as glucose and starch. It is termed as photosynthesis because it can only occur in the presence of sunlight. The chlorophyll pigment in plants help in trapping the energy from the sun.