Which statement is true regarding the rate of transpiration in a dorsiventral (dicot) leaf?

Stomata are absent in:

If the rates of transpiration and water absorption of a flowering plant are measured over a period of $24$ hours,it is found that the rate of transpiration reaches its peak at about mid-day and then declines,whereas the peak for water absorption is reached approximately two hours later. Which one of the following statements provides the best explanation of these results?

Stomata in angiosperms do not open during:

The process of the escape of liquid from the tip of an uninjured leaf is called:

Which of the following facilitates opening of stomatal aperture?