Which term describes the open pores on leaves that allow gas exchange?

Which term describes the open pores on leaves that allow gas exchange?

• A. Guard cell
• B. Stomata
• C. Style
• D. Stigma

Answer: (B)

Stomata are the open pores on leaf surfaces that enable gas exchange. Each pore is controlled by a pair of guard cells; when these cells become turgid, the pore opens, and when they lose turgor, the pore closes. Open stomata allow carbon dioxide to enter for photosynthesis and permit oxygen and water vapor to exit. The opening is influenced by light, carbon dioxide levels inside the leaf, humidity, and the plant’s water status. Guard cells are the cells that regulate this opening, while other terms refer to flower parts, not leaf pores.

Stomata are the open pores on leaf surfaces that enable gas exchange. Each pore is controlled by a pair of guard cells; when these cells become turgid, the pore opens, and when they lose turgor, the pore closes. Open stomata allow carbon dioxide to enter for photosynthesis and permit oxygen and water vapor to exit. The opening is influenced by light, carbon dioxide levels inside the leaf, humidity, and the plant’s water status. Guard cells are the cells that regulate this opening, while other terms refer to flower parts, not leaf pores.