Didn't Luxorien say that mutagens facilitate the appearance of resistance? If that could be shown for various cases with various mutagens, I would take it to be strong evidence.scottie wrote:How does one distinguish between what is a random and what is a prescribed cellular response to outside pressure.
Cat wrote:FYI - I am one biologist that disagrees… Most mutations are neutral.
It depends on whether you're talking about mutations to the genotype or mutations to the phenotype.
arfeltayona wrote:Here is a short post...
How then is mutation (a change in the DNA sequence hence the genome) not a cause for Species Genesis... when basically the main difference between species is genetics?
How then can accumulation of Mutation not a cause for Species Genesis when differences in environmental pressure could cause a shift in Species Population for varying genome composition...
Frankly, I'm lost here...
Speciation is related to hybridization. According to the biological species concept, separate species cannot produce viable hybrids. Why does this definition work? I'll give the best explanation with my current understanding.
An hybrid is kind of like a junk-yard car with incompatible parts. If you're combining Toyota parts, you might get something that works. If you're combining Toyota and Nissan parts, you're less likely to get a working car.
Anti-evolutionists think that successive mutations can't result in new adaptations. In other words, the populations can't evolve new parts. I have never heard the following concepts from an anti-evolutionist, but I'm presuming this to be what follows. When a population is separated geographically, the separated populations shouldn't evolve their own unique sets of parts (assuming the anti-evo viewpoint). That is, even though they may diverge genetically, the blue-print for optimal functioning shouldn't change. Thus genetic divergence shouldn't result in reduced hybrid viability, and the populations should always have the potential to merge back together.
Again, this is just what is IMO what we should expect to see if the anti-evolutionists are right. We could easily test this by separating an insect population for some time, then observing hybrid viability.