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Unformatted text preview: pipetter. The other three filtrates were all applied to separate W plates through use of the pipetter, using clean tips each time. Finally, the water was applied to a W plate. The plates were left alone to grow for two weeks. Each plate was left to grow for the same period of time, and under the same conditions. These functioned as the controls of the experiment. To collect data, the plates were observed under a microscope. The number of “mittens” and “bulbs” on each plate was recorded. These numbers were then compared to the data collected from the previous portion of the lab where the strains were left to grow on their own without filtrates. Results (Tables and Figures): Results (Written): Discussion: The results of the experiment support the hypothesis that the M strain can send a signal and that the application of an M strain filtrate to a W strain plate will have an effect....
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- Spring '11
- Strain, two weeks, Scientific control, Tzvia Cuperman