(a(i))[3]
Explain how glucose is made in leaves.
(a(ii))[1]
State the name of the process that plants use to transfer sucrose from a source to a sink.
(a(iii))[2]
Explain why sometimes roots act as a source rather than a sink.
(b(i))[2]
State the name of the tissue shown by tube Q and the name of the tissue shown by tube S in Fig. 2.2.
(b(ii))[4]
Explain why the sucrose solution moves along tube Q in the model in Fig. 2.2.
(c)[1]
Suggest why the movement of sucrose in tube Q stopped.
(d)[1]
State the name of the mineral ion that is used to make amino acids.