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11 Cards in this Set
- Front
- Back
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Epidermis |
Covers the whole plant allowing light to penetrate through |
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Xylem |
Carries water and minerals from the roots around the plant |
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Phloem |
Carries dissolved sugars through the plant |
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Palisade mesophyll |
Where photosynthesis takes place Likely to contain chloroplasts to absorb light |
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Spongey mesophyll |
Some photosynthesis. Has air spaces for diffusion of CO2 and O2 |
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Guard cells |
Cells that can open and close the stomata |
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Stomata |
Opening that allows O2 and CO2 to diffuse in and out of leaf |
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Transpiration |
Loss of water vapour from the leaves by evaporation from cells and out from the stomata |
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Transpiration stream |
Movement of water from the roots, up the steam and to the leaves |
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Translocation |
Movement of sugars within the plant |
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Factors affecting transpiration |
Temperature- increase in temperature means increase in transpiration rate Humidity- increase in humidity decreases rate of transpiration as if the air is dryer the concentration gradient is greater Wind speed- higher winds means faster diffusion Light- more light means faster diffusion as it will open the stomata |
