(a)[1]
What does the term organ mean?
(b(i))[1]
Identify the tissue marked A in Fig. 4.1.
(b(ii))[1]
Identify the structure marked C in Fig. 4.1.
(b(iii))[3]
Describe how the tissue marked B is adapted to maximise photosynthesis.
(c(i))[1]
State two substances that are transported only in the phloem.
(c(ii))[2]
Explain why some parts of a plant can act as both a source and a sink.
(d(i))[2]
Suggest why the rate of oxygen production was not the same as the rate of photosynthesis.
(d(ii))[3]
Explain the results shown in Fig. 4.2.
(e)[2]
Draw a line on Fig. 4.2 to predict the results at 10 ^{\circ}C.