What is stomata

Q. Why do desert plants have small leaves or leaves that have been reduced to spines?

1. To bear more flowers
2. To minimise water loss through transpiration
3. To absorb more water from the atmosphere
4. To reduce the rate of photosynthesis

Q. Stomata are present on the underside of

1. Flower
2. Fruit
3. Leaf
4. Seed

Q. Main task of stomata is to

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

Q. Plant in deserts have few stomata to reduce

1. Water intake
2. Water loss
3. Mineral content
4. Oxygen intake

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.