AP BIOLOGY

Detailed explanation-1: -[B] As light intensity decreases, the rate of transpiration increases because stomata are closed in the dark.

Detailed explanation-2: -The opening and closing of stomata is the function of light. During the daytime, stomata remain open to facilitate the exchange of gases, so that carbon dioxide could enter the plants thus, carrying out photosynthesis. Hence during the daytime rate of transpiration is also high.

Detailed explanation-3: -Abstract. A widespread perception is that, with increasing wind speed, transpiration from plant leaves increases. However, evidence suggests that increasing wind speed enhances carbon dioxide (CO2 ) uptake while reducing transpiration because of more efficient convective cooling (under high solar radiation loads).