(a(i))[1]
Identify the cell type labelled B.
(a(ii))[6]
Water moves from A to D. The arrows on the diagram show the movement of water molecules during transpiration. Using these arrows, name and define the process shown by arrow 1, arrow 2 and arrow 3.
(b)[3]
Leaves of different plant species can transpire at different rates even when the environmental conditions are the same. Suggest and explain structural differences in the lower surface of these leaves that could cause differences in transpiration rate.