Lamarck and his theory principles

Lamarck’s theory was that if an organ or a body part ( arm, neck, leg…) was used a lot, it becomes stronger and if it wasn’t used it would get weak so he thought that these changes would be passed to their offspring.

For example a giraffe uses its neck to obtain food but some day the giraffe wouldn’t be tall enough to catch its food so he would have to stretch his neck and  it would get stronger and longer, then baby giraffes would inherit longer necks.giraff

But his theories were disproved by experiments  and are no believed because physiological changes can’t be passed through genes because only changes on genes can be passed on.

 

images by pilar legido

information of biodeluna

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  1. #1 by jara on April 17, 2011 - 4:32 pm

    i love your images!!! i thought an example with the giraffes too! =)

  2. #2 by pilarlegido on April 17, 2011 - 9:05 pm

    i have been all morning doing it 🙂

  3. #3 by biodeluna on April 26, 2011 - 12:14 am

    Yes! really cool drawings.
    To get more info about the lamarckism principles I can recommend u this web:
    http://www.liftminds.com/lesson/60/Mechanisms_of_evolution_lamarckism_principles

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