OCR AS Xerophytic Adaptions

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Biology Mind Map on OCR AS Xerophytic Adaptions, created by kin034 on 14/05/2014.
kin034
Mind Map by kin034, updated more than 1 year ago
kin034
Created by kin034 about 11 years ago
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Resource summary

OCR AS Xerophytic Adaptions
  1. Hairy Leaves - trap water vapour as a layer of moisture
    1. Sunken Stomata - found in pits to trap water vapour
      1. Rolled Leaves - presence of hinge cells which reduces the surface area exposed
        1. High Solute Concentration in Cells - reduces water potential inside leaves
          1. Thick, Waxy Cuticle - waterproof to reduce water loss, relatively impermeable
            1. Small, Needle Leaves - reduces surface area
              1. Fewer Stomata - reduces diffusion of water vapour
                1. Stomata on Lower Surface - less exposure to sun, reduces diffusion
                  1. Densely Packed Spongy Mesophyll - smaller surface area for evaporation
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