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gilbert3729
Commander
Joined: 01 Aug 2004
Posts: 390
Location: New England, USA
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 Sun Sep 19, 2004 11:24 pm |
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| gilbert3729 wrote: | | Gondor Girl wrote: | | Oh, I was referring to something that someone said earlier (I think) but anyhoo. They aren't all that different from each other, they just have different beaks. That's pretty much the only difference. That was micro-evolution a slight mutation of a species having a little feature changed, but it's not one species slowly changing to another. |
I remember from biology class about a type of whale that changed into a land animal. Over thousands of years it began growing legs and forarms. i forget the reason that it began to evolve but they have skelleton records of this animal over the course of its evlution. Actual skelletons which show change of a creature's physique is proof that is hard to ignore. |
I was talking o my old biology teacher about this and she reminded me that it was the other way around. A land animal became a sea animal. The way that they know this is in the fossil records, the sea animal has skeletal parts that only a land animal would have. Pelvis and sorts. Anywho, just thought that i would correct my mistake 
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Jeremy
J's Guy
Joined: 03 Oct 2002
Posts: 7823
Location: Aberdeen, Scotland
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| Mon Sep 20, 2004 1:23 am |
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Can someone explain how these changes are carried on when the creature reproduces. The changes are made when the creature's DNA is slightly different. So what happens when it mates with another creature that's DNA is the same as all the rest? Dones it make some new kind again. If so then all that would happen is the species disintegrate as they become too different.
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Hitchhiker
Rear Admiral
Joined: 11 Aug 2004
Posts: 3514
Location: Ontario, Canada
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| Mon Sep 20, 2004 7:26 am |
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No, because the DNA changes are gradual. Both genes, the new one and the old one, are passed onto the child. One is active, one is not, but they're both there. For example, my parents both have brown eyes, but I'm blue-eyed because I got the recessive gene from my grandparents.
It all depends on which gene is activated. Rapid mutation is dangerous, yes, that's why most mutations are slow adaptations to the environment.
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