Monday, October 13, 2008

Darwin's Theory of Evolution

My professsor Mr. Jimenez brought several turtles/tortoise to our class on October 2, 2008. This was an adventure for my daughter and I. As a class were able to view each turtle/ tortoise and try to determine if they were land or water creatures, what they ate, and if they had web or claw feet. We had a wonderful time trying to figure out each and we did a pretty good job at it. This exercise was carried out as a result of us finding out about Darwins theory of evolution as the survival of each turtle depended on Darwin's theory "the survial of the fittest". Different turtles lived in diferent areas, ate different things, and had diferent features yet they all survived.
Darwins recieved his inspiration of the evolution through his visit of the Galapogos Islands, off the coast of Ecuador.


A summary of Darwins Theory:

A species is a population of organisms that interbreeds and has fertile offspring.
  • Living organisms have descended with modifications from species that lived before them.

  • Natural selection explains how this evolution has happened:

    More organisms are produced than can survive because of limited resources.

    Organisms struggle for the necessities of life; there is competition for resources.

    Individuals within a population vary in their traits; some of these traits are heritable passed on to offspring.

  • Some variants are better adapted to survive and reproduce under local conditions than others.

    Better-adapted individuals (the "fit enough") are more likely to survive and reproduce, thereby passing on copies of their genes to the next generation.
    Species whose individuals are best adapted survive; others become extinct.

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