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Guard Cells Stomata Plants Water Change Shape Draw

Front Draw, label and annotate how guard cells are specialised for their function.
Back Guard cells:
  • They form small openings on surfaces of leaves - stomata
  • Stomata allow CO2 to enter plants but also allow water to exit plants
  • When the cells lose water, they become less swollen due to osmotic forces, change shape and stoma closes to prevent further water loss from plant
  • Cell wall is thicker on one side so the cell does not change shape symmetrically as volume changes


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