Structure of Stomata
Stomata are typically comprised of two specialized cells called guard cells, which surround a central pore. The guard cells are kidney-shaped and contain chloroplasts, which are responsible for photosynthesis.Function of Stomata
Stomata play a crucial role in the process of transpiration, where water evaporates from the plant's surface, helping to regulate the plant's internal water balance. Additionally, stomata facilitate the exchange of gases, allowing carbon dioxide to enter the plant for photosynthesis and oxygen to exit.Regulation of Stomata
The opening and closing of stomata are regulated by various factors, including light, carbon dioxide concentration, and the plant's internal water status. When the plant requires carbon dioxide for photosynthesis, the stomata open, but they close to conserve water during dry conditions.Study Guide for Stomata
- Describe the structure of stomata and the role of guard cells.
- Explain the function of stomata in the process of transpiration and gas exchange.
- Discuss the factors that regulate the opening and closing of stomata.
- Compare and contrast the stomatal density in different plant species and their adaptation to specific environments.
- Investigate the impact of environmental factors, such as temperature and humidity, on stomatal behavior.
Summary
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PHYSICAL SCIENCE (NGSS)
Energy
Students who demonstrate understanding can:
Develop and use models to illustrate that energy at the macroscopic scale can be accounted for as either motions of particles or energy stored in fields.