(a(i))[4]
Explain why temperature affects the rate of photosynthesis.
(a(ii))[3]
Explain why the rate of photosynthesis will decrease if the humidity in the apparatus becomes very low.
(a(iii))[2]
Explain how the scientists would use the readings for the concentration of carbon dioxide in chambers 1 and 3 to calculate the rate of photosynthesis.
(b(i))[2]
Use the information in Fig. 3.2 to complete Table 3.1.
(b(ii))[2]
Explain why the rate at which carbon dioxide is used in photosynthesis is greater than the rate of carbon dioxide uptake.
(b(iii))[1]
Explain why the results in Table 3.1 are expressed as ‘per cm$^2$ of leaf’ rather than ‘per leaf’.
(c)[6]
Discuss the advantages of growing crops in glasshouses.