MeDeFe wrote:
ok, so a species of bacteria evolving to display features the species did not previously have is not evolution, or have I misunderstood you? (emphasis mine:d1g)
MeDeFe, you're begging the question. Anything EVOLVING to do anything is EVOLUTION By definition. But no, a species adapting to do something it couldn't do before is NOT necessarily evolution, nor evidence for it, unless a new species is thereby created.
What would it be if some humans started growing scales over their bodies instead of hair? I think that's a comparably big change to what happened with the bacteria.
First, no, it's not comparable. A human with scales would arguably be a whole different animal; that's evolution. More comparable would be if a certain population of people developed the ability to digest different things in response to their environment. I'm not at all sure that hasn't already happened, and frequently. They're still human and could reproduce with non-adapted people. The only impediment is that the dating process would be difficult because, being in very different parts of the world, they might never meet, and if they did they probably wouldn't want to go to the same restaurants.
Second, that's an awful big "what if." It hasn't happened, nor is it likely to, so it's irrelevant. If it ever did happen, perhaps we could find out if these adapted people could reproduce with regular people. If they couldn't, that might be evidence for evolution.
The right answer to the wrong question is still the wrong answer to the real question.