Are you sure about this? The definition of evolution is the change in allele frequency. With the widespread of introduction of anti-biotics and how bacterial populations everywhere have reacted to them, I'd say that bacteria is a perfect demonstration of evolution.
Randman is sure that
his definition of evolution has never been observed. Note how he lumps all of "bacteria" into a single "form."
Rand(straw?)man is yet another of the misguided Creationists who, despite everyone's best efforts to educate him, has never been able to understand that the Theory of Evolution does not and never has suggested that a microbe should give birth to a chihuahua, or that a snake should lay an egg that hatches a chicken.
Randman will say that "we have never seen a bacteria produce anything as offspring other than more bacteria," completely missing the point when it comes to actual changes in allele frequency in populations. Until
e coli morphs into a hamster or we actually observe a change on a level higher than the species level ("kind" seems to be something similar to "family," I think), he'll dismiss any speciation or other observed confirmation of the predictions of evolution as "adaptation within kinds."