Exchange systems in plants
- Created by: Uswa
- Created on: 23-03-13 15:52
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- Exchange Systems in Plants
- Mechanisms
- Carbon dioxide enters leaves by DIFFUSIOn
- Most of water and mineral ions are absorbed by ROOTS
- Plants have a stomata
- To obtain carbon dioxide from atompshere
- To remove oxygen produced in photosynthesis
- Adaptations
- Surface area of ROOTS increased by ROOT HAIRS
- Surface area of LEAVES increased by flattened shape & internal air spaces
- Loss of water
- Mainly lose water from LEAVES
- Through the stomata
- Size of stomata is controlled by GUARD CELLS which surround them
- Through the stomata
- Evaputation is more rapid in these conditions
- Hot
- Windy
- Dry
- If plants lose water faster that it is replaced by roots
- Stomata can close to PREVENT WILTING
- Mainly lose water from LEAVES
- Mechanisms
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