Quote:
Originally Posted by Kazikli Bey
I'm not saying that it is impossible, what i am wondering is how people can accept adaptation when that theory was discredited. But what i think people may mix up is natural selection anyway. You say adaptation occurs all the time, however it is more likely to be survival of the fittest.
|
Lamarckism has been refuted. So what? We dont need individuals to pass changes they acquired during their life time on to their children in order to see evolution working. DNA recombination and mutation together with not yet fully understood genetic mechanisms that "guide" mutation processes are mostly enough for evolution to take place, and there is enough evidence that confirms that it is taking place.
I have not used above the word "adapt" in regards to behavior either, but in terms of the Genes (and not in the Lamarckistic way either). During evolution the genetic code of the species adapts to the demands in order to grant the survival of it. Maybe I have not used the correct terminology though.
Quote:
The best example i can give is when fish that are better suited for warmer waters are suddenly put into water that is cooler then normal. Those fish with the genes to survive better in cooler waters will survive, whilst those that do not have the genes will not survive. As these fish give birth (if we assume that the only fish to procreate are those with the genes more suited to cooler waters) then the next generation of fish will be better suited to the cooler waters, except for those that get the dominate/ recessive gene that acclimatises them to warmer water.
However, that is a form of micro-evolution, survival of the fittest, and not adaptation over time.
|
I really have problems to understand what you are meaning. But if you mean that Lamarcks concept was flawed, yes it was. I never intended to claim anything different.
Quote:
|
I lack the expertise too but that doesn't stop me from wondering (a basic knowledge in the field does this to me) how the evolution occurred from fruigovores to omnivores.
|
As you have said, survival of the fittest, together with the natural variation of genes and maybe mutation etc. That might be a good guess.