in the plant body from the surrounding air through stomata and water is absorbed by the plant from soil through roots in the presence of sunlight. This process is called photosynthesis which occurs in plants for the preparation of food materials. Here food refers to glucose molecules. Oxygen is also produced in this process.
Carbon dioxide - with water - is one of the reactants in photosynthesis. If the concentration of carbon dioxide is increased, the rate of photosynthesis will therefore increase
