A-LevelBiologyTransport in plantsOct/Nov 2017Paper 2 Q59 Marks
The tree species Caryocar brasiliense grows in areas where there is very little rainfall for five months of the year. During this long dry season the trees have mechanisms to reduce the rate of transpiration. An investigation was carried out on C. brasiliense to find out how the rate of transpiration and the mean water potential of leaf cells changed over 12 hours in one day during the dry season. The results are shown in Fig. 5.1 A and B. [Figure 5.1]
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