Biology A-Level
Stomatal aperture
What Stomatal aperture means in Biology A-Level, as defined for OCR.
Definition of Stomatal aperture
Check what you remember
Read the wording for your board, then hide it and explain Stomatal aperture in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
The opening of stomata, which environmental factors change to affect the transpiration rate.
Topics that use Stomatal aperture
- Transport in plants (OCR A-Level)
Related terms
- Cohesion and adhesion
- Control of environmental variables
- Hydrophyte
- Osmosis
- Potometer
- Rate calculation
- Source-to-sink transport of assimilates
- Surface area to volume ratio in plants
Using Stomatal aperture in the exam
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