AP BIOLOGY

Detailed explanation-1: -Light Intensity: Increasing the light intensity to which a plant is exposed is predicted to cause an increase in the rate of transpiration. Increasing light exposure will cause more stomata to open in order to facilitate photosynthetic gas exchange.

Detailed explanation-2: -We can use a potometer to investigate how different conditions affect the rate of transpiration. In the previous section, we learnt that the rate of transpiration is influenced by light intensity, temperature, air movement (wind) and humidity.

Detailed explanation-3: -Investigating transpiration Under normal circumstances, the rate of water uptake gives a measure of the rate of transpiration . A simple potometer is a piece of capillary tubing to which a plant has been connected. The water uptake is measured by recording the time taken for a bubble in the tube to move a set distance.