Wednesday, October 21, 2009

Week 2

Dawkins states that the first "replicators" were made possibly from molecules that may have been created coincidently, and the "replicator" also learned how to clone itself into many more "replicators"(Dawkins, Richard, 1976-1999, p. 15). Dawkins also notes that it isn't hard to believe that a simple molecule from the "Primevil Soup" theory could become the first start of "living" things, because molecules are consistent in their matter (Dawkins, Richard, 1976-1999, p. 15). Dawkin's states too, that after many clones of the first "replicator" that perhaps more complex molecules were further added(Dawkins, Richard, 1976-1999, p. 15). Dawkins also suggests that "Natural Selection" kept the best "replicators" and the others went extinct, and as a result, the best "survival machines"(Dawkins, Richard, 1976-1999, p. 19). The author, Richard Dawkins stated that the "replicators" became the blueprints for "life" and that DNA is responsible for the more complex-organisms-humans(Dawkins, Richard, 1976-1999, p. 21). There are so many different combinations that occur during either mitosis or meiosis with DNA; that it's like a lottery of what genotypes any "organism" may inherit. Plus how new species evolved and emerged with crossing-over and "Natural Selection" makes better species(My Own Words). In comparison, author, Peter Mayhew states that from the very first organized molecule that led to "life" went through many baby-steps over evolutionary time, and made several modifications, too(Mayhew, Peter, 2006, 2009, pp. 14, 15). Mayhew also notes that over time that the "living" cell became more complex and thus led to "multicellular" organisms"(Mayhew, Peter, 2006,2009, p. 15). I beleive that peter Mayhew's theory is more probable but not by very much compared to Richard Dawkins theory of the first "replicators." Autotrophic life I believe is the first recipients from the first mollecular cell because they are the "primary producers" on our planet. With the creation of autotrophic "life" (plants), the primitive "cell-of-life", thus became more complex over evolutionary time to create animals that eat the autotrophs. Both Autotrophs and heterotrophs mutually benefit from each other in everu aspect of their "life histories."

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