mycorrhiza
Well-Known Member
yeast remains yeast. Bacteria changes, but remains as bacteria. Changing habits or appearance or size or shape does not change the body plan so that the organism is no longer the same organism. The bacteria has not become anything less then bacteria.
Bacteria is not a single body plan. There are many different kinds of bacteria. We wouldn't expect to see changes into a whole new taxonomic domain in our lifetime. Since you agree that they change in both appearance and size, isn't that a change in body plan? We have observed speciation, and we shouldn't expect whole new genuses or families, because that takes a very long time and modern science has only existed for a few years. Why should we expect to directly observe or recreate something that took millions of years in our own lifetime?
Yes, 6000 years is quite a short time, however, humanity has existed for 200,000 years. Still a short time when it comes to evolution. We have evidence of several species of humans (homo genus).and what of humans....6,000 years and many generations later we are still human with the same body plan. but humans have changed shape, size, color and appearance...this could be likened to different species of human...but all still human nonetheless.
Again, we have several examples of this in both genetics and the fossil record.Evolution is 'change over time'...its not proven to create new 'families' over time though.
Lenski's e.coli experiment has had 50,000 generations to observe and no changes have been observed that have resulted in a new morphology.
I said higher species and since they observed a change in their size and shape, that was a change in their morphology. If scientific terms are to be used in the debate, they should be used correctly.
I think it's amazing how much we have been able to recreate in about 25 years. Add a few million to that and we're talking.