plant biology
- Created by: Jess
- Created on: 07-05-13 19:47
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- Plant Biology
- Transpiration
- 1) plants take up water from roots.
- 2) water passes through the plant to the leaves
- 3) water evaporates from the leaf cells
- 4) water vapour diffuses out of the stomata
- 3) water evaporates from the leaf cells
- 2) water passes through the plant to the leaves
- 1) plants take up water from roots.
- Exchange
- Gases diffuse in and out of the leaves through the stomata.
- Oxygen- waste product of photosynthesis Carbon dioxide- needed for photosynthesis
- Plants lose water through evaportion through leaf cells and diffusion through the stomata.
- Leaves are flat so they dont need to diffuse very far.
- Water and minerals are taken up by the root, root hair cells increase surface area,
- stomata lets carbon dioxide in for photosynthesis at the same time the plant is losing water vapour through the stomata- the roots need to absorb more water to prevent wilting.
- Gases diffuse in and out of the leaves through the stomata.
- Wilting of the whole plant can reduce water loss, the leaf collapses and hangs down which reduces surface area.
- Guard cells can close to prevent water loss.
- Conditions which increase the rate or evaportaions will increase the rate of transpiration.
- Transpiration
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