Bio lab paper - The Age of Bacteria ID #: 00576556 Ukpong...

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The Age of Bacteria ID #: 00576556 Ukpong Eyo; 002:010:008 November 13, 2007
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1. One of the reasons that Gould argued that bacteria are the dominant life form on earth is because there is evidence that bacteria have been around since the beginning of life forms on our planet and are still a very important part of life today. Bacteria have been around for an estimated three billion years as compared to eukaryotic cells which have been recorded as first emerging around 1.8 to 1.9 billion years ago. Another reason Gould gives to explain why bacteria are the most dominant life form on earth is the fact that bacteria that lived long before multicellular animals even existed generated the original supply of oxygen in the earth's atmosphere which in turn made it possible for multicellular animals to form and evolve. Without bacteria in the beginnings of earth's creatures we would not be here. Yet another reason that bacteria are one of the, if not the most important life form on earth is their ability to reduce the amount of dead organic matter on our planet. If it weren't for bacteria, our planet would be overflowing with all kinds of waste making it unpleasant or even impossible for multicellular animals to exist. According to Gould we could never wipe out the population of bacteria on earth. Bacteria can thrive in all kinds of different environments, from boiling temperatures to freezing temperatures even thousands of feet below the surface of the earth. These creatures are so diverse and widespread that any form of destruction of animal life on earth could not completely destroy the environment of the bacteria or even make a dent on the vast numbers of bacteria on our planet. 2. One of the most common classical methods used to study bacteria was pure cultures. A pure culture is a culture that consists of only one type of organism, or bacteria in this case. A major reason why this method is not entirely suitable in the study of bacteria is
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the presence of microbial communities and the interactions between different types of bacteria to serve a common function. If only pure cultures are used to study bacteria, then the nature of the communities and networks bacteria create would not be studied and understood. Another reason that pure cultures are no longer considered the best way to study bacteria is because the majority of bacteria resist formation in cultures. Since these bacteria do not thrive in cultures researchers cannot study their behavior and growth in the same way as the types of bacteria that thrive in cultures. Because of this the types of
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Bio lab paper - The Age of Bacteria ID #: 00576556 Ukpong...

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