Question 3 (1 point) \( \begin{array}{l}\text { What is the primary site for gas exchange and transpiration in the leaf? } \\ \text { Stomata } \\ \text { Stems } \\ \text { Roots }\end{array} \)

Did you know that the stomata, tiny openings typically found on the underside of leaves, can open and close to regulate gas exchange like a bouncer at a club? These little guys not only let carbon dioxide in for photosynthesis but also allow oxygen and water vapor to escape, maintaining the plant's internal balance. In practice, this means during a hot sunny day, stomata might close to prevent excessive water loss while ensuring enough CO2 for those sweet sugar-making reactions. But if they close too tightly, it can lead to a shortage in CO2 and hinder the plant’s ability to photosynthesize effectively!