2dimes wrote:I have no issue with adaptation. Maybe darker skin, the mutated or improved gene that blocks a certain desease. How did things work out that some eventually adapted to become a turtle and I seemingly can type? Wretched seen of Cain?
No.
See, again, that is why we say you don't really understand evolution. AAfitz put it well. Darwin's ideas of "survival of the fittest" is mostly what happens when things are stable. It accounts for very slow, gradual changes (note that means slow even by geologic terms, almost all evolution, even "rapid" is very, very, very slow in human terms). Then you get a cataclysm. Huge numbers of species die off, only a few sets of genes are left. When this happens in succession, you wind up with a few, diverse species.
Take bacteria. The process is the same, its just sped up because bacteria breed so much faster than most larger species. You can have multiple generations in a day, so the results of evolution are a bit more evident. Anyway, if you get sick and take penicillin, but don't finish the dose because you "feel better", then you have killed some, but not all of the bacteria. Those that are left are naturally those more resistant to the drug. Now, did those bacteria "predict" that this drug would come along and respond? No, of course not. Mutations happen. In millions and millions of bacteria, its likely a few will have a mutation that will give them some resistance to penicillin. Some mutations, perhaps the same one, perhaps other mutations, will impart resistance to other drugs, etc. Anyway, you don't finish the bottle, the bacteria grow. You get sick again, only this time, its will a penicillin-resistant strain of the bacteria. Worse, chances are, you will pas some of this bacteria around and infect others with this new, penicillin-resistant bacteria. And, suddenly, doctors have to hurry and find a new drug to use. This process will repeat with that new drug. ..e tc. Even worse, many bacteria are able to exchange DNA. (not just viruses do this) So, now its not just that original disease, its many diseases that have this same resistance to penicillin, even completely new diseases (in some cases). And, understand, when I say they change DNA, I definitely don't mean that all bacteria in a population do this. It only takes a few. Then, using the drugs does the rest.
And that is why doctors are saying that soon we won't have anything to fight new diseases. Luckily, in a few cases, the bacteria have gone through enough mutations that they no longer have the original resistance to penicillin. But, there is no guarantee of that, at all. And, as I explained above, those bacteria can "acquire" resistance frmo other bacteria.
We cannot prevent this process. We can slow it by taking all our medication when its prescribed. AND, we can stop insisting on "bacteria resistant" everything. Ironically enough, this process won't happen with plain old soap and water. Soap simply physically removes all.