What Is Stomata

Q.

CAM plants keep stomata closed in daytime, thus reducing loss of water. They can do this because they

1. fix CO2 into sugars in the bundle-sheath cells.

2. use the enzyme phosphofructokinase, which outcompetes rubisco for CO2.

3. fix CO2 into pyruvate in the mesophyll cells.

4. fix CO2 into organic acids during the night.

Q.

Why do CAM plants open their stomata at night?

Q.

CAM plants keep stomata closed in daytime, thus reducing loss of water. They can do this because they

1. fix CO2 into organic acids during the night.

2. fix CO2 into sugars in the bundle-sheath cells.

3. fix CO2 into pyruvate in the mesophyll cells.

4. use the enzyme phosphofructokinase, which outcompetes rubisco for CO2.

Q. Graminaceous stomata

1. Are found in monocotyledonous plants
2. Have thin walled middle region
3. Have bean-shaped guard cells
4. Have thick end walls

Q. In what form is potassium absorbed by plants ? Write any two functions of potassium in plants ?

Q. Main task of stomata is to

1. Intake of carbon dioxide and the release of oxygen
2. Intake of water
3. Release of carbon dioxide
4. Release of sugars