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Microbial Diversity Brett Larose BSC 2011 Section #20 2/15/2009 By signing below, I guarantee that I am the sole author of this manuscript: Name: ____________________________________________________________ Date: ____________________ Introduction A microorganism, or a microbe, is a microscopic organism that is naked to the human eye. Prokaryotes, which make up the domains Archaea and Bacteria, are unicellular microbial organisms that are thought to have been the first organisms to inhabit the Earth. Because of their long evolutionary history, prokaryotic populations have been subject to natural selection for approximately 3.5 billion years. This enormous amount of time has allowed prokaryotes to become immensely diverse and adapted to their respective environments. (Campbell, 2008) Due to the extreme diversity present within prokaryotes, it is very difficult to distinguish between the different species. Because of the immense varieties present in Prokaryotes, scientists yearn to collect simple and uniform samples of diversity. Microbiologists have since then established a system in which culture mediumsliquids designed to support the growth of microorganismsare used to stimulate prokaryotic growth in agar plates. In this specific experiment, agar (a substance derived from seaweed) infused with different nutrients is used as the culture medium. (Lab Manual, 2008) In this experiment, microbial diversity that comes off a potato, cilantro, grape and strawberry after being washed will be tested. Petri plates already loaded with agar will be ... View Full Document

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