Describe the route that a water molecule follows from the soil to the xylem.
Using the data in Table 3.1, calculate the transpiration rate for the plant kept at 30^{\circ}C.
Describe and explain the contrast in the results for the plants kept at 15^{\circ}C and 25^{\circ}C.
Predict the effect of these conditions on the transpiration rate. Explain your prediction.
Complete the sentences about water movement through the xylem. The xylem carries water and [BLANK]. Xylem cells form a long continuous [BLANK] with thick walls containing cellulose and [BLANK]. Water moves upwards in the xylem because of transpiration [BLANK]. This draws up a [BLANK] of water molecules, held together by [BLANK] between water molecules.
Explain why wilting happens.
Explain one way in which the marram grass leaf shown in Fig. 3.2 is adapted to cut transpiration.