daws101
Diamond Member
- Jul 7, 2011
- 41,526
- 3,122
biased not credible site...Here is proof for macro-evolution:
Historical contingency and the evolution of a key innovation in an experimental population of Escherichia coli
From 1988 till 2010, scientists from Michigan State created populations of e. coli and observed them evolve in a controlled experiment. When oxygen is present, e. coli cannot grow and citrate and that became a defining characteristic of this bacteria.
After 30,000 generations the e. coli gained the ability to grow on citrate. This trait has been observed on the bacteria afterwards.
Wrong, wrong, wrong, this is one of your only examples of what you call Macro evolution but is it really when you really look at the evidence ?
Here let's do that.
Is Macroevolution True? A Response To Tim D.
Posted in: Creation/Evolution|By: Jonathan McLatchie|July 31, 20118 Comments
When Frank recently informed me that he planned to publish a guest article by atheist Tim Duck on the scientific evidence for neo-Darwinian evolution, I was immediately intrigued. As someone with some background and academic training in biology (I hold a degree in the field), I looked forward to reading what Tim had to say. When Frank forwarded me Tims final draft of his essay, however, the result was a tremendous anti-climax. The first half of the essay (which you can view here) was essentially wasted in laying out elementary concepts of biology known by every freshman undergraduate. When he finally did get around to presenting his case, the result was disappointing.
We were treated to a lengthy discussion of Michigan State University biologist Rick Lenskis now-famous experimental work on E. coli (about which we are not ignorant). The only other identifiable positive argument for the claim in question was the assertion without justification that an indefinite extrapolation from micro- to macro- evolution is warranted. But since this is what Tim allegedly set out to prove, this constitutes a remarkable instance of begging the question.
But before getting into the specifics, allow me to highlight a few areas on which Tim and I are agreed. We agree that evolution possesses explicative power (we disagree over the extent). We agree that evolution does not entail atheism (one can accept evolution and remain a Christian theist). We agree that evolution, strictly speaking, has nothing to say on the origin of life. And we agree that argumentum ad consequentiam is a logical fallacy.
As to the specific example of adaptive evolution given to us by Tim D., this same example as I recall was given by Richard Dawkins in his most recent popular book, The Greatest Show on Earth. The case of the citrate transporter seems, to me, to be a weak one because it has been documented that wild-type E. coli can already use citrate under low-oxygen conditions. Under these conditions, citrate is transported into the cell (Pos et al. 1998). The gene in E. coli specifies a citrate transporter. In the presence of high levels of oxygen, it is thought that the citrate transporter doesnt function or is not produced. Thus, wild-type E. coli already possesses the genes necessary for the transportation of citrate into the cell and its subsequent utilisation. Indeed, Lenski et al. (2008) note that A more likely possibility, in our view, is that an existing transporter has been co-opted for citrate transport under oxic [high oxygen level] conditions. Such a scenario could take place by a loss of gene regulation (meaning that the gene is no longer expressed exclusively under low oxygen conditions) or a loss of transporter specificity.
Is Macroevolution True? A Response To Tim D. - Cross Examined - Christian Apologetics | Frank Turek