Here's why:
* Stomata and Gas Exchange: Guard cells are specialized cells that surround the tiny pores called stomata on the surface of leaves. These stomata are responsible for gas exchange, allowing carbon dioxide to enter for photosynthesis and oxygen to exit.
* Active Regulation: Guard cells actively regulate the opening and closing of stomata. This regulation requires a significant amount of energy.
* Chloroplasts and Energy Production: Guard cells have a high concentration of chloroplasts, which are the organelles responsible for photosynthesis. These chloroplasts provide the guard cells with the energy they need to carry out their functions.
Therefore, the high energy demands of guard cell function are met by the presence of numerous chloroplasts.
