Matters on a. Mandar's Heart

Tuesday, January 11, 2005

BGYB51

Third evolution lecture. During my 4hr break, i was studying ...and had a few questions...so i went to ask the prof. One of the evidence she gave for evol'n were intermediate organisms.. there's fossils of orgnaisms that were reptiles w/ feathers...showing they they were in intermediate stages.. evolving into a bird.. so...my question: shouldn't there be these intermediate organisms ALIVE now? ...why are they only in fossils. I went to her office, hoping to catch her off guard with my question..he hee. She said how it's only when we're looking back that we'll realize when a species will diverge- we can't know in the present. And once say "x" diverged into reptiles and birds...it's impossible for the new reptile to evolve into a bird because it's already gained it's special adaptive structures ("fit") as a reptile....so then i asked how come there's no intermediates of prime mates and homosapians walking around...she said some think chimps are intermediates of humans & orangutans..it's 'relative'...

then i told her how i'm skeptical about all this evolution stuff...i told her how i understood and its makes sense..on a micro level.. but as a whole...i can't accept it. She was super nice.. she said most ppl can't.. but it's alright. Tha's the thing i love about utsc..the profs are so helpful and sincere =)

Btw she does her research on sexual cannibalism in spider ...lol =)

6 Comments:

  • At 10:48 p.m., Blogger faithtivity said…

    hey dan dan..i'm glad you have a nice prof :)

     
  • At 12:00 a.m., Blogger Jaysfreak said…

    Sexual cannibalism in spiders? Uhhhh...hmmm...yeah, I have nothing to say. Just want to comment. PTL!

     
  • At 1:36 p.m., Blogger living for an audience of ONE said…

    I wonder why evolution has stopped for somethings. If it is a progressive thing, what difference does a "fit" make? Shouldn't they evolve to faster or stronger forms? Or constantly be moving up.

    No scientist here, but that bucket has a pile of holes.

    Glad you have a prof who understands your issues.

    I'm with the other post.....not sure what to do with the spider thing.

     
  • At 1:01 a.m., Blogger A Mandar said…

    i think the best explaination is that evolution only occurs in response to the environment. "fit" means best fit to the environment...so if the environment doesn't change, there's no selection on certain traits... organisms don't just evolve with no "selector/driving force"

    Part of the theory believes that the earth is some super billion of years old..it was really hot and humid..etc..and once in a blue moon, major events changed the env't ...which changed the traits that were best "fit" for that env't.. so according to that, i guess since earth isn't changing THAT dramatically, there's no need to "change/evolve"..i dunno if that makes sense

     
  • At 7:57 p.m., Blogger faithtivity said…

    isn't sexual cannabilism when female spiders kill and eat their mates?

     
  • At 12:52 a.m., Blogger A Mandar said…

    ohhhhh...those were questions..? i thought those were analogous to "weird looks"..but online..

    so sexual cannibalism.. it's like faith said, after mating, the female spider eats the male spider =) ...i'll tell you guys next semester how this apparently is "evidence" supporting evolution =) Aren't you guys thankful you're not a spider?

     

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