AP BIOLOGY

Detailed explanation-1: -The rate of transpiration increases when atmospheric pressure is low. During low atmospheric pressure, air will move out of the plant as a result of diffusion. At low pressure, the water vapour moves fast thus the rate of transpiration increases.

Detailed explanation-2: -When a low-pressure system moves into an area, it usually leads to cloudiness, wind, and precipitation. High-pressure systems usually lead to fair, calm weather.

Detailed explanation-3: -The rate of transpiration will increase with a decrease in atmospheric pressure. Air will move out of the plant easily as the atmospheric pressure decreases. Hence, the rate of transpiration increases, and plants lose more water easily. So, option B is the correct option.

Detailed explanation-4: -Temperature plays a major role in the rate of transpiration. As the temperature increases, transpiration will increase due to a higher concentration in sunlight and warm air.