“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. Light energy is absorbed by the green chemical chlorophyll.”

All animals and human beings are dependent on plants for food and these plants synthesize the food via physio – chemical process called Photosynthesis. This process is important because:It is the primary source of food.It results in the release of oxygen in atmosphere.Early experiment for Photosynthesis.In the year 1770, Joseph Priestly performed several experiments that revealed the role of air in growth of green plants.In the year 1854, Julius Von Sachs provided evidence of the production of glucose during the growth of plants. This glucose is stored as starch and later, he concluded that the green substances are located in special bodies within plant cells. He also concluded that glucose is made in the green part of the plant and is stored as Starch.

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