An experiment is set up using a bubble potometer to study the rate of transpiration in a leafy shoot under different wind speeds.
What does the movement of the air bubble in the capillary tube of the potometer directly measure?
The volume of water lost by evaporation from the leaves of the shoot
The volume of water taken up by the shoot
The volume of water produced during respiration in the shoot cells
The volume of water utilized in photosynthesis by the shoot