AP BIOLOGY

Detailed explanation-1: -The transpiration rate is directly proportional to the absorption of water by the roots from the soil. A decrease in water absorption causes the closure of stomata and wilting, thereby reducing the rate of transpiration.

Detailed explanation-2: -Video Solution: Transpiration is directly proportional to humidity.

Detailed explanation-3: -The wider the leaf area, the greater the rate of transpiration because wide leaves tend to have more stomata [5].

Detailed explanation-4: -Plants transpire more rapidly at higher temperatures because water evaporates more rapidly as the temperature rises. At 30°C, a leaf may transpire three times as fast as it does at 20°C. The rate of diffusion of any substance increases as the difference in concentration of the substances in the two regions increases.

Detailed explanation-5: -The relative humidity of the atmosphere is inversely proportional to the rate of transpiration. High temperature decreases relative humidity, which forces the stomata to open even in the dark, thus increasing the rate of transpiration.