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AQA Biology 8.1 structure of DNA

Charlotte Hewson

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OCR AS Xerophytic Adaptions

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Biology Mind Map on OCR AS Xerophytic Adaptions, created by kin034 on 14/05/2014.

Mind Map by kin034, updated more than 1 year ago

	Created by kin034 about 11 years ago

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OCR AS Xerophytic Adaptions

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

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