NEET Exam > NEET Videos > Biology Class 11 > Stomata Structure
Stomata Structure Video Lecture | Biology Class 11 - NEET
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FAQs on Stomata Structure Video Lecture - Biology Class 11 - NEET
| 1. What is the structure of stomata? |  |
Ans. Stomata are microscopic structures found on the surface of plant leaves and stems. Each stoma consists of two specialized cells called guard cells, which surround a pore called the stomatal pore. The guard cells can change their shape to open or close the stomatal pore, controlling the exchange of gases and water vapor between the plant and its environment.
| 2. How do stomata function? | |
Ans. Stomata play a crucial role in plant physiology by regulating the movement of gases, such as carbon dioxide and oxygen, as well as water vapor. During photosynthesis, stomata open to allow carbon dioxide to enter the leaf for use in the process. At the same time, oxygen produced during photosynthesis is released through the stomatal pores. Stomata also control the loss of water vapor from the plant through transpiration. When the plant is experiencing water stress, the guard cells close the stomata to reduce water loss.
| 3. What factors influence the opening and closing of stomata? | |
Ans. The opening and closing of stomata are influenced by various factors. One of the main factors is light intensity. In the presence of light, stomata tend to open to allow for photosynthesis. Another factor is the concentration of carbon dioxide in the surrounding environment. High levels of carbon dioxide promote stomatal opening, while low levels trigger closure. Additionally, plants respond to changes in humidity, temperature, and water availability, which can also affect stomatal behavior.
| 4. Why are stomata primarily located on the lower surface of leaves? | |
Ans. Stomata are primarily located on the lower surface of leaves to minimize water loss through transpiration. The lower surface is less exposed to direct sunlight and wind, reducing the chances of excessive water evaporation. Placing stomata on the lower surface also helps to protect them from dust and other potential obstructions that could block the stomatal pores.
| 5. What happens if stomata are unable to close properly? | |
Ans. If stomata are unable to close properly, it can lead to excessive water loss and dehydration in the plant. This can be detrimental to the plant's overall health and survival, especially in dry or arid environments. Additionally, when stomata are unable to close, it can result in an uncontrolled influx of carbon dioxide and a loss of control over photosynthesis. This can negatively impact the plant's growth and productivity.
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Nov 15, 2024 Last updated |
Video Description: Stomata Structure for NEET 2024 is part of Biology Class 11 preparation.
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