histhasthai:The fact is, if you take a bacterial culture, comprised of more than one strain of the same basic bacteria, and add an antibiotic that kills some, but not all of the individuals, the entire culture at some future point will be comprised of the resistant strain, even if that strain was a trivial minority to start with. The culture as a whole has changed in response to its environment.
Indeed, and a bacterial colony is an excellent example of what natural selection can do. In unusual circumstances, things that would normally constitute an organism being a harmful mutant, as in almost all cases antibiotic-resistant bacterial are, can be momentarily advantageous. Nonetheless, this is never because of the creation of a resistance factor, but because the organism actually severed one of its metabolic or other pathways, through which the antibiotic would normally do its work. The resistant bacteria are always at a disadvantage to their unmutated brethren in bacteria in antibiotic-free environments.
This is not the sort of "evolution" needed for Darwinism to explain life as we see it. These are destructive, not constructive mutations. They build nothing, but like the town burning a bridge to stop raiders, break something down as a desperation move to save themselves, but lose something useful in the process.
We have only ever observed mutation and natural selection break things down or produce minor variations in existing structures. We've never seen the creation of a new structure. Darwinists try to get around this by calling for very long periods of time, but this has never been demonstrated, even in the fossil record, which shows a tendency towards new organisms appearing suddenly and staying basically static for long periods of time.