What happens to the rate of transpiration when the temperature increases?

What happens when the rate of transpiration exceeds the rate of absorption?

Phenyl mercuric acetate is used as an:

Transpiration efficiency is the ratio of

Generally,stomata are found on the lower surface of a leaf. Thus,the approximate percentage of transpiration through the abaxial surface is: (in $\%$)

The transpiration in plants will be lowest when: