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Bio LAb Report - Emmanuelle Bailey-Greene General Biology...

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Emmanuelle Bailey-Greene General Biology Lab II October 19 th , 2011 Water Movement in Plants Introduction: Transpiration is the loss of water vapor from certain parts of plants. It occurs most majorly through the stomata on the underside of the leaves, but also occurs at a slight degree through the stem and roots. In this experiment, two plants of the same species are exposed to varying degrees of heat, one at room temperature and the other at a higher temperature caused by the application of a heat lamp. The rate of transpiration will be measured by the volume of water left in the base of the pot containing each plant. The hypothesis is that as temperature increases, the rate of transpiration will increase. The null hypothesis is that the rate of transpiration will remain constant as temperature increases. Results: Table 1: Raw data for subject exposed to room temperature Experimental Conditions (room temperature) Water loss per 15 minute interval (a) mL at start = 4.5 mL (b) - (a) = 0 (b) mL at 15 minutes = 4.5 mL (c) - (b) = 0 (c) mL at 30 minutes = 4.5 mL
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