6.1 Water and ion uptake.
1 . Ion is taken up into the plants by:
- Active transport.
2 . Water is taken up into the plants by:
- Root pressure.
- Transpiration pull
6.2 Transpiration and translocation.
1 . Transpiration is the process by which water is lost from the leaves of the plants.Factors affecting the rate of transpiration:2. Humidity.• Temperature.• Wind.• Light.•
2 . Factors affecting the rate of transpiration:Humidity.• Temperature.• Wind.• Light.•
3 . Light:
- The rate of transpiration will be high when there is light.
4 . Temperature:
- The higher the temperature, the higher the rate of transpiration.
5 . Humidity & wind:
- The lower the humidity, the higher the rate of transpiration.
- The wind blows away the water vapour surrounding the leaves, in other words, the humidity surrounding the leaves become low, so the rate of transpiration is high.
6 . Higher rate of transpiration when it is:
- Less humid.
7 . How to measure the rate of transpiration:
- Using a potometer
8 . Translocation is the process by which food substances(glucose) are transported to other parts of the plant through the phloem.
9 . The foods are transported to other parts of the plant because:
- For energy.
- To make new cells.