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Where are the dinosaurs?
- Thread starter JoeyArnold
- Start date
The Engineer
I defeated Dr Goetz
You have no idea what evolution is. It is not caused by those factors, it is guided. Learn the difference. Or, even better, learn what evolution is.
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I have no idea??? I wasn't the one that said that being a better cook causes evolution to happen. . .
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The Engineer
I defeated Dr Goetz
Advantageous traits only establish themselves if they offer a reproductive advantage. If the members of a population with the advantageous trait reproduce more successfully, i.e. if they produce more children than the members without the advantageous trait, the trait will be established. If they don't, for whatever reason, it won't.
For apes, having large teeth is a reproductive advantage, because it makes eating and hence surviving easier for them. For humans, it's not a reproductive advantage, because we have learned how to prepare our food so we don't have to rely on large teeth.
What this means is that humans with large teeth have no reproductive advantage over humans with smaller teeth. In fact, the humans with smaller teeth may have the advantage because they may (or may not, don't know about that although it's a possibility) have less complications when losing their primary teeth and because smaller teeth use less resources.
In short, the reproductive advantage stemming from having larger teeth vanished with the advent of cooking.
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So cooking eliminated a reproductive advantage that humans with wisdom teeth had. Is that the same as saying that cooking food causes evolution?
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The Engineer
I defeated Dr Goetz
No, because evolution always happens when an imperfect reproduction of genes occurs, i.e. every generation. The advent of cooking did not cause evolution, unless you specifically talk about the evolution of the human teeth, in which case it may be valid.
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So, we had a full mouth of teeth. Then someone had a mutation that caused them to be sans at least one wisdom tooth and maybe up to four. There was no reproductive or survivability issue. So, through the generations, the frequency of missing wisdom teeth has increased.
Since we are, then cooking food may be a valid cause of evolution.
The cooking of food seems a little 'far fetched' as to be the reason that we started showing up without wisdom teeth, but I'll accept it. A reproductive mistake that left someone without wisdom teeth seems a lot stronger of an explanation.
Why wouldn't missing wisdom teeth be the result of an allele variation/supression? (I hope I used 'allele' in the right context).
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The Engineer
I defeated Dr Goetz
Exactly!
Well, in this context, yes. Yes, it's a valid cause for the evolution of missing wisdom teeth.
These two reasons are not exclusive. The invention of cooking was not the reason why humans were born without wisdom teeth, but it's the reason why this trait stayed.
This could very well have been the case. Mutations are the cause of new traits, but selection decides which traits are going to stay.
I think so, yes.
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Though a More Varied Gene Pool is more Desirable. Makes for more Potential benefits (and more potential disadvantages too. I will be honest about that.)
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pgp_protector
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Does evolution state that creatures get better through the process of adpating, mutating, evolving, changing?
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