(a)[3]
Name a process that occurs in the plant in Fig. 4.1(a) only in daylight and explain how the leaves assist this process.
(b)[4]
The folding of the leaves at night, as shown in Fig. 4.1(b), is known as a sleep movement. Suggest and explain how these sleep movements affect water loss from one of these plants.
(c(i))[2]
Explain what is occurring in the leaf between 1800 hours and 2000 hours.
(c(ii))[2]
Explain what is occurring in the leaf after 2200 hours.