The gas exchange area of leaves is decreased by their internal air spaces.A. True B. False

Final answer: The internal air spaces within leaves increase the surface area for gas exchange and are crucial for facilitating both photosynthesis and transpiration. Therefore, the claim that internal air spaces decrease the gas exchange area is false. Explanation: The statement that the gas exchange area of leaves is decreased by their internal air spaces is False. In fact, the internal air spaces in leaves, which are part of the mesophyll layer, increase the surface area available for gas exchange. These spaces allow carbon dioxide to diffuse deeper into the leaf and reach more chloroplasts for photosynthesis, while also facilitating the exit of oxygen produced during the process. Furthermore, these air spaces contribute to maintaining high humidity that aids in the diffusion of water vapor outwards when the stomata are open, which in turn increases the rate of transpiration. The air spaces in a leaf play a vital role in plant physiology as they aid in gas exchange and help regulate water vapor loss. The opening and closing of the stomata are essential for gas exchange and the balance of water loss. When the stomata are open, water vapor is lost to the external environment, which increases the rate of transpiration. Conversely, when stomata close to conserve water or due to high temperatures or bright sunlight, this process slows down, which decreases the amount of water available for evaporation and hence, transpiration.