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Essay / Research Paper Abstract
This 4 page report discusses the origins, evolution, and purposes of cyanobacteria
Bibliography lists 6 sources.
Page Count:
4 pages (~225 words per page)
File: D0_BWcyanob.rtf
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Unformatted sample text from the term paper:
been referred to as "blue-green algae" since they contain chlorophyll (Columbia Encyclopedia) and are also referred to as prokaryotes-the scientific term for blue-green bacteria. Furthermore, and because they are bacteria,
they are very small and most often single-celled (Columbia Encyclopedia). Of course, anybody who has seen pond scum has seen that they also grow into colonies that are easily visible,
especially in bodies of water in which there is relatively little movement - ponds, small lakes, isolated inlets. What is one of the single most interesting aspects of cynaobacteria that
the student working on this project will find is that they are considered to be the "oldest known fossils, more than 3.5 billion years old" (Columbia Encyclopedia). Ancient Proof of
Life Because cyanobacteria have been in existence for so many millions of years, they have served as something of a marker for understanding the age of the planet and its
other inhabitants. An article in New Scientist (12-02-00) makes note of the fact that there have actually been colonized life (not animal of human life) "more than a billion years
earlier than thought" (p. 23). The article refers to chemical analysis done by Yumiko Watanabe of Pennsylvania State University of "2.6-billion-year-old soil from a site in South Africa" showed that
there were a surprising number of organic compounds in the mix (p. 23). Watanabes analysis showed that: "the compounds came from photosynthetic cyanobacteria" (p. 23). His premise is that such
microbes spread in a mat like formation across soil that was rich in clay until they reached the thickness of approximately a centimeter (p. 23). Jennings (2003) uses the existence
of cyanobacteria to make her point that: "For more than 3.5 billion years, microbes of untold diversity have dominated every corner of our biosphere" (p. 159).
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