Which term is defined as the exchange of gases in plants?

Which term is defined as the exchange of gases in plants?

• A. Internode
• B. Petals
• C. Transpiration
• D. Radicle

Answer: (C)

Gas exchange in plants happens mainly through the stomata, tiny openings on the leaves that open to let CO2 in for photosynthesis and O2 out, while water vapor also escapes. The term that best describes this whole process, including the related movement of water through the same openings, is transpiration. The other terms refer to parts or structures not involved in gas exchange: internode is a stem segment, petals are floral components, and the radicle is the embryonic root.

Gas exchange in plants happens mainly through the stomata, tiny openings on the leaves that open to let CO2 in for photosynthesis and O2 out, while water vapor also escapes. The term that best describes this whole process, including the related movement of water through the same openings, is transpiration. The other terms refer to parts or structures not involved in gas exchange: internode is a stem segment, petals are floral components, and the radicle is the embryonic root.