(a(i))[2]
Identify two visible features in Fig. 2.1 that show an aphid is an insect.
(a(ii))[1]
State the letter in Fig. 2.2 that labels the structure aphids feed from.
(a(iii))[1]
State two nutrients carried in the phloem.
(b)[3]
Calculate the percentage change in the rate of translocation from $15\,^{\circ}\text{C}$ to $30\,^{\circ}\text{C}$. Give your answer to three significant figures.
(c(i))[4]
Explain how translocation differs between spring and summer in the potato plant shown in Fig. 2.3. Use the terms source and sink in your answer.
(c(ii))[1]
Identify the type of reproduction the potato plant is using when it forms the tubers.