A-LevelBiologyTransport in plants9700/12 · Oct/Nov 2019 · Q261 Mark
What is a definition of transpiration?
Athe evaporation of water vapour from a leaf due to the diffusion of water from an area of low water potential to high water potential
Bthe loss of water vapour from a plant to its environment by diffusion down a water potential gradient
Cthe movement of water from root to leaf due to the adhesion of water molecules to one another
Dthe uptake of water by plant roots by movement of water down a continuous water potential gradient from air to soil
✓ Correct answer
B: the loss of water vapour from a plant to its environment by diffusion down a water potential gradient
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