(a(i))[2]
State two features visible in Fig. 3.1 that show this animal is an insect.
(a(ii))[2]
Suggest ways to prevent a serious aphid infestation on crop plants.
(a(iii))[2]
State the names of two tissues in the leaf that the aphid’s mouthparts pass through to reach the phloem.
(b(i))[1]
Complete Table 3.1 by working out the rate of movement of $^{14}\text{C}$ in trial 3.
(b(ii))[3]
Outline how $^{14}\text{C}$ in carbon dioxide gas becomes built into sucrose molecules that are translocated in the phloem.
(c(i))[2]
State two parts of a plant that are sinks for sucrose.
(c(ii))[3]
Describe the uses of sucrose by sinks.