(a(i))[4]
Using the information in Fig. 5.1, explain how nitrate ions enter the root hair cell.
(a(ii))[1]
State two methods by which nitrogen fixation occurs.
(b)[1]
State the name of the process by which water molecules move into root hair cells.
(c)[5]
Describe differences and similarities between the structure of a plant root hair cell and a bacterial cell.