A-LevelBiologyTransport in plants9700/12 · May/June 2017 · Q221 Mark
The graph shows the loss of mass in a potted plant due to transpiration. [Graph showing mass/g vs. time/minutes with a point X] What could have occurred at point X on the graph?
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
Aplastic bag was placed around the plant.
BThe lower epidermis was sealed with petroleum jelly.
CThe plant was placed into a dark cupboard.
DWarm moving air was blown over the plant.
✓ Correct answer
D: Warm moving air was blown over the plant.
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