GUJARAT Class 10 - Mode of Nutrition in Plants and Animals Videos

Boiling of the leaf will ensure that the cells are dead. Dead cells of the leaf will enable the plasma membrane of the cells to let the pigment molecules out of the cell.

Potassium hydroxide reacts with carbon dioxide and uses it up. Hence, the air is free of carbon dioxide in experiments determining the role of carbon dioxide in photosynthesis.

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, thereby closing the stomata.