PATHOLOGY

PATHOLOGY MCQ

CELL DAMAGE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Terrestrial plants have stomata on the surface of their leaves. A single stomata is surrounded by two guard cells that change shape in response to environmental factors and open or close the stoma. Which of the following best explains how the structure of the leaf is used in processes that occur in plants?
A
Energy for cellular reproduction is absorbed through the surface of the leaf.
B
Water enters the plant through the surface of the leaf for transpiration
C
Gases for photosynthesis are exchanged through the surface of the leaf.
D
Carbon dioxide enters the plant through the surface of the leaf for cellular reproduction.
Explanation: 

Detailed explanation-1: -A single stomata is surrounded by two guard cells that change shape in response to environmental factors and open or close the stoma. Which of the following best explains how the structure of the leaf is used in processes that occur in plants? B. Gases for photosynthesis are exchanged through the surface of the leaf.

Detailed explanation-2: -Stomata regulate gas exchange between the plant and environment and control of water loss by changing the size of the stomatal pore. This stomatal movement is affected by several environmental stimuli, such as relative humidity, CO2 concentration, and light intensity.

Detailed explanation-3: -Stomata are more numerous on the lower side of the leaf to prevent transpiration. Transpiration is the loss of water through stomata, so, more stomata are found on the lower surface to prevent excessive loss of water.

Detailed explanation-4: -This helps us because having too much carbon dioxide in the air makes it hard for us to breathe. Terrestrial plants get plenty of air so they usually have stomata on the bottoms of their leaves. Aquatic plants have their leaves near or under the water, but they also need to breathe.

Detailed explanation-5: -Several environmental factors affect stomata opening, including hormone, light quality and intensity, air humidity, atmospheric CO2 concentration, biotic and abiotic stresses.

There is 1 question to complete.