Combined Science GCSE
Guard cells
What Guard cells means in Combined Science GCSE, as defined for AQA.
Definition of Guard cells
Check what you remember
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Reference: AQA
Two cells surrounding each stomatal pore that change shape to open or close the pore, controlling gas exchange and water loss.
Topics that use Guard cells
- Plant tissues (AQA GCSE)
Related terms
- Air spaces
- Chloroplasts
- Epidermal tissue
- Gas exchange and diffusion
- Meristem tissue
- Palisade mesophyll
- Phloem
- Specialised plant cells
Using Guard cells in the exam
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