(a(i))[5]
Suggest and explain why the photosynthesis rate of the plant falls to zero just above $40\,^{\circ}\text{C}$.
(a(ii))[3]
On Fig. 8.1, draw the curve you would expect if the same experiment were done with a tropical plant, such as sorghum. Explain your curve with reasons.
(b(i))[1]
Finish Table 8.1.
(b(ii))[3]
Plot a graph on the grid below from the table data to show how light intensity affects the rate of photosynthesis.
(b(iii))[2]
With reference to photosynthesis, state what is meant by a limiting factor.
(b(iv))[1]
State the limiting factor for these four experiments.