Limiting Water Loss In Plants

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In order to survive terrestrial organisms must limit their water loss without compromising the efficiency of their gas exchange systems. Insects have a water-proof covering and a small surface area to volume ratio. Plants have a water-proof covering but cannot have a small surface area to volume ratio. This is because they need a large surface area to capture the light and to exchange gases for photosynthesis. Xerophytic Plants are plants that do not have a plentiful water supply and have developed adaptations to limit water loss through transpiration. Examples of their modifications to prevent water loss include: Thick Cuticle. The thicker the cuticle the less water can escape through transpiration. Rolling up of


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