AP BIOLOGY

Detailed explanation-1: -The rate of transpiration depends on various factors like humidity, temperature, sunlight, atmospheric pressure and wind speed. As the wind blows faster, the water released by transpiration is carried away faster. So, rate of transpiration increases with velocity of wind speed.

Detailed explanation-2: -As the relative humidity of the air surrounding the plant rises the transpiration rate decreases. It is easier for water to evaporate into dryer air than into more saturated air.

Detailed explanation-3: -Transpiration increases with an increase in temperature to a certain point. Stomata close when the temperature falls to very low or increases to very high ultimately ceasing the process of transpiration.

Detailed explanation-4: -Windy air contributes to evaporation. As wind speed increases, plants react by upping their rate of transpiration, which is the plant’s loss of water as it’s absorbed through the roots, up to the leaves, and out the leaves as it evaporates. More than 90 percent of the water a plant absorbs is lost by transpiration.

Detailed explanation-5: -Wind – Wind can alter rates of transpiration by removing the boundary layer, that still layer of water vapor hugging the surface of leaves. Wind increases the movement of water from the leaf surface when it reduces the boundary layer, because the path for water to reach the atmosphere is shorter.