A) Photosynthesis will stop if the openings on the underside of the leaves are closed.
Explanation:
Photosynthesis produces sugars (glucose) by using carbon dioxide and water in presence of sunlight and chlorophyll. And oxygen is produced as a bye product of photosynthesis.
For the process of photosynthesis to take place continuously, it is very necessary that a continuous supply of Carbon dioxide and water is maintained into the cell.
Carbon dioxide enters the cell by the process of diffusion. The gases diffuse in and out of the plant tissue through the small openings on the surface of the leaves. These openings are called stomata.
If stomata remain closed then the diffusion of gases will cease . As a result photosynthesis will stop due to lack of raw material. Soon the plant will use up the reserve food and starve to death.
