Friday, April 30, 2010

Natural Selection in the Galapagos Islands


Click here to view an animation that shows natural selection occurring on a small island called Daphne Major in the Galapagos. 

Why were the large-beaked finches able to survive the drought that occurred on Daphne Major in 1977? Why did the average beak size return to normal after the drought in 1977?

Click here to view a second animation about a fictional organism called the pollenpeeper. Witness how the pollenpeeper evolves as you observe natural selection and adaptive radiation in action.

24 comments:

  1. The first animation was really helpful. It was a really good example of natural selection. It was interesting and helped me understand this even better!

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  2. I can't believe how the environment changes the species of pollenpeepers so much, it's really amazing.

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  3. 1/6 (almost there?)

    The second one is much easier to use and more informative- i think
    And I cant believe that your mom EATS YOU in the big al game

    -matthew 7i

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  4. this is really interesting i didnt know natural selection varied over time.
    and this is kinda off topic but i have a shampoo that has extra "amino acids" and i was wondering what these extra amino acids do. maybe that make a cool post. if you reserch what they did..

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  5. This animation helped me to understand natural selection better!! Thanks Leslie.
    Jonathan C. 7G

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  6. i really liked this
    thanks leslie
    -shay

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  7. this was really interesting.
    but how does a population evolve with a majority of the species having the better characteristics? is it just that when some of them are born, they're born with the better characteristics? how does it start?

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  8. Thanks for the animations. I get how natrual selection works in different species, now. It's so cool to see how those birds have different beaks for different purposes :3

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  9. Does natural selection show that a trait was always their? Or does it mean that if yourb orn with a certain mutation has to occur.
    alessandro g

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  10. Im not sure if this is really appropriate for our unit but I found this quite interesting!
    http://news.yahoo.com/s/ygreen/20100427/sc_ygreen/sixamazinghybridanimals

    Its really cooL!

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  11. It would be weird if natural selection could occur with humans *shudder*

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  12. That was actually really interesting, but i wish you could some how manipulate the pollenpeepers and see what happens, like moving some to a new habitat.
    Adam DeHovitz

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  13. hey, adding on to hannah i have like a face wash with amino acids. what doe that mean?

    and thanks for the animations!

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  14. thanks leslie those were pretty cool.

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  15. This is really interesting, and makes so much sense! It's a perfect example of natural selection, and is really helpful!
    To answer alessandro's question, natural selection is when there is a group of individuals in a species, each with different traits, like some have a big beak and some have a small beak. When there is competition for food, the individuals with traits that help them get the food will get it first. Mutations don't directly influence natural selection.

    -Claire, 7H

    -7H

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  16. Wow! Its really fascinating how certain species can evolve over time just based on how they migrate to knew regions to find new food supplies, population overflow, ect.

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  17. I wonder how long it took us to evolve from apes
    Lauren!

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  18. It's really cool how organisms are able to change their characteristics based on the environment around them, over time. It would be so much more efficient if we could do it faster, though, and on purpose!

    -Caitlyn 7H

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  19. Leslie, I have a question, could we evolve wings in a milliom years?

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  20. I feel so bad for the organisms who die of just because they don't have the advantageous genetic info., but any way, this really helped.

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  21. i totally agree with what caitlyn said. it would be so helpful.

    Megan 7h

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  22. i wonder if we could grow wings and then become a penguin like speceice. that would be cool

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  23. what does ocvans s stand for? I cant find it!!!! AHHHH!!!!!

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  24. If i were a bird i would be a raven...
    Although the downside is my favorite snack would be eyeballs and gross meat..

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