Transpiration
What Transpiration means in Biology A-Level, as defined for AQA, OCR.
Definitions of Transpiration
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Reference: OCR
The loss of water vapour from the aerial parts of a plant, mainly through stomata in the leaves.
Water evaporates from the surfaces of mesophyll cells and diffuses out through the stomata.
The loss of water vapour from aerial parts of a plant, mainly through stomata.
Topics that use Transpiration
- Mass transport in plants (AQA A-Level)
- Transport in plants (OCR A-Level)
Related terms
- cohesion
- Cohesion and adhesion
- companion cells
- Control of environmental variables
- Hydrophyte
- Hydrostatic pressure gradients
- Mass flow hypothesis
- Osmosis
Using Transpiration in the exam
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