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Comparing number of stomata on the upper and lower epidermis of a xerophyte and its effect on the rate of transpiration
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- Words:
- 3603
- Submitted:
- Tue Aug 19 2003
... Comparing number of stomata on the upper and lower epidermis of a xerophyte and its effect on the rate of transpiration Introduction: This coursework aims to compare the number of stomata on the upper and lower epidermis of a xerophyte and its effect on the rate of transpiration. Transpiration is the loss of water from a plant. This loss of water can occur through the cuticle and lenticels, but mainly through the stomata. Transpiration is necessary for transporting nutrients, cooling the plant, moving sugar and chemicals, and keeping upward water pressure. Water is pulled into the roots because of evaporation and hydrogen bonding. Evaporation then pulls on this chain of molecules. The rate of transpiration is dependent on the size of the stomatal aperture and the diffusion gradient between the leaf and the atmosphere. The internal factors of the plant, which affect the rate of transpiration, include surface area of the leaf, thickness
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