Stomata are responsible for gas exchange in leaves.

Stomata are responsible for gas exchange in leaves.

• A. True
• B. False
• C. They are responsible for nutrient transport
• D. They are structural support

Answer: (A)

Stomata are pores on the leaf surface surrounded by two guard cells that regulate gas exchange. They open to let carbon dioxide enter for photosynthesis and allow oxygen to exit, while also controlling water vapor loss through transpiration. The opening and closing respond to light, internal CO2 levels, humidity, and drought signals, balancing the leaf’s needs for carbon gain with water conservation. This is why stomata are the main structures involved in gas exchange in leaves. They do not transport nutrients (that happens in xylem and phloem) nor do they provide structural support.

Stomata are pores on the leaf surface surrounded by two guard cells that regulate gas exchange. They open to let carbon dioxide enter for photosynthesis and allow oxygen to exit, while also controlling water vapor loss through transpiration. The opening and closing respond to light, internal CO2 levels, humidity, and drought signals, balancing the leaf’s needs for carbon gain with water conservation. This is why stomata are the main structures involved in gas exchange in leaves. They do not transport nutrients (that happens in xylem and phloem) nor do they provide structural support.