(a)[2]
Complete the sentence describing transpiration. Water evaporates from the surfaces of the [BLANK] cells into the air spaces and then [BLANK] out of the leaves, through the stomata, as water vapour.
(b)[3]
Explain how water is transported upwards through the xylem.
(c(i))[4]
Describe and explain the results displayed in Fig. 2.1.
(c(ii))[1]
Draw a line on Fig. 2.1 to predict the results in the light with increased humidity.
(c(iii))[4]
Predict the result and explain your prediction.