Q4. Give a brief description of the presence of the synthesis of food in green plants.
Photosynthesis: Synthesis of food occurs in the presence of sunlight, it is called photosynthesis. (Photo: light; synthesis: to combine)
Material Required for Photosynthesis: CO2, Water, Minerals, chlorophyll, Sunlight.
CO2: Comes from the atmosphere through stomata
Water & minerals: Comes from the soil through Xylem.
Chlorophyll: Present in leaf ( Green Pigment) and help leaf to capture the energy of sunlight.
Sunlight: Comes from sun & it is utilized for synthesis of food.
In the green plant, the synthesis of food occurs by a process called Photosynthesis. Plants use a simple chemical substance like carbon dioxide, water, and minerals for the synthesis of food.
During photosynthesis, chlorophyll-containing cells of leaves, in the presence of sunlight, use carbon dioxide and water to synthesis carbohydrates.
This process can be represented by an equation-
Carbon dioxide + water ➜ carbohydrates + oxygen
in presence of sunlight and chlorophyll.
During this process, oxygen is liberated and the formed carbohydrates are stored in the form of starch.