cw10 wrote:
http://en.wikipedia.org/wiki/Pilus
Some bacteria don't reproduce asexually btw.
Bacteria can exchange genetic material, yes. However, this is not how they reproduce. Bacterial "sex" begins and ends with two organisms, it doesn't produce a third organism. This process is only comparable to sexual reproduction insofar that it allows bacteria to mix parts of their genome.
Imagine you were a bacterium. You'd clone yourself through cell division, over and over, until you're surrounded by millions of clones. You don't need any partner for that, but the cloning process is error-prone. One of your clones has a point mutation in its DNA, which makes it more resistant to antibiotics. Yay! Evolution in action!
This mutant clone can now go around and pass its beneficial new gene on to other clones. That's faster and less resource-intensive than cell division and allows for the rapid evolution of new, more resilient bacteria strains. But that's not quite the same as two sexually dimorphic organisms creating a third organism by combining their DNA. Bacteria don't do that.
Quote:
Good is not just an opinion. If you follow a good route home, and repeat the process, it becomes fact. The fact is, it's a good route. That's a fact.
What exactly makes the route "good"? Is it the shortest way home? That can indeed be a fact. Distance is measurable and empirically provable, but "good" is not.