Lab 12 - help us lead healthier lives Exercise 2 A Below is...

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Lab 12 / Michael Schonfeld Exercise 1 A. The sample I observed the most microbial growth was the kitchen sponge. However, to my surprise, the electric light switch had the least microbial growth. B. The differences seemed to have a correlation between the surface on which they were found, and the number of colonies initially found. It seems that wood (cutting board) has a higher tolerance to microbes, or maybe it ʼ s simply hostile to microbes, since they were far less colonies on the wood surface, than the number of colonies I found from plastic, and metal surfaces. C. It seems that microbes from warmer sites multiplied faster. My estimate, is that the optimal growth temperate is at or around that of the human body (+/- 37°c) and thus they were already multiplying faster to begin with. D. This information is very useful in the everyday life. The Frst thing I did, in light of these results, is I got rid of my kitchen sponge. I will also be replacing it very often, from now on. Ultimately, this information can potentially save our lives, and/or at least
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Unformatted text preview: help us lead healthier lives. Exercise 2 A. Below is a table comparing the different characteristics: B. The differences in the growth pattern of different microbes seems to be concentrating in the color and shape of the growth. The shape tells us about the likelihood of the microbe to group together (mold and yeast) and form big colonies, or separate itself and be on its own (like bacteria). C. I was able to some individual microorganisms, mostly I assume are bacteria, since mold and yeast had more of a tendency to grow together. D. In some of the plates, especially the kitchen sponge, I believe I was able to identify more than one type of bacteria, with the help of the color of satin. I don ʼ t see how I could identify this differently, as all bacteria seemed to look alike (color and shape). Type Color Shape Bacteria White / Cream / Yellowish Circular Mold Gray - Changing color from the center outwards Irregular Yeast White / Cream / Yellowish Circular...
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