AP BIOLOGY

Detailed explanation-1: -Open stomata increase transpiration rate in the presence of light.

Detailed explanation-2: -Light intensity: The transpiration rate is increased due to the increase in light intensity. During daytime in the sunlight, the rate of transpiration is faster. This is because the stomata remains open to allow the inward diffusion of carbon dioxide for photosynthesis.

Detailed explanation-3: -[D] As light intensity decreases, the rate of transpiration increases because stomata are open in the light.

Detailed explanation-4: -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.