Reading assn 4 - Gabi Drusinsky 994727868 Reading...

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Gabi Drusinsky, 994727868 2/12/10 Reading Assignment #4 Why Bacteria are Simple Bacteria are one of the amazing organisms found on earth. They have been around for millions of years and will outlive mankind. Yet, these organisms are among the tiniest and simplest organisms found. The great success of these tiny organisms is due in large part to their tiny size and the simplicity of their genomes. Bacteria are unique in several ways, but one of their most interesting habits is their tendency to purposely lose genes. Bacteria have adapted to live in other organisms or to live off of the nutrients of other organisms, which means that many of their genes are not necessary. These genes are called “junk DNA” and are no longer beneficial to the organism; therefore, selection favors the loss of those genes. In addition to losing genes, bacteria are also able to pick up genes from neighboring organisms or other bacteria. The ability for both the loss and gain of genes without any physical consequences is what make bacteria so successful.
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Reading assn 4 - Gabi Drusinsky 994727868 Reading...

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