Why Guard Cells Open and Close Stomata?

Explanation: When guard cells open CO2 gets in for the process of photosynthesis to take place..Water gets out the leaf from the stomata through transpiration. So, for CO2 to get in for the plant to photosynthesize food, water gets out. ... This makes the inner thick walls to come near each other so the stomata close.

Why is it important that guard cells open and close?

One of the most important functions of guard cells is to control the closing and opening of the stoma/pores. While the opening of these pores allows water to be released into the environment, it also allows carbon dioxide to enter the cell for photosynthesis (as well as the release of oxygen into the environment).

How guard cells help in opening and closing of stomata?

The opening and closing of stomata are controlled by the guard cells. When water flows into the guard cells, they swell up and the curved surface causes the stomata to open. When the guard cells lose water, they shrink and become flaccid and straight thus closing the stomata.