Originally linked to by gunnysgt (believe it or not):
"One of the interesting observations of the last few years has been the observation that DNA molecules share sequences of information even though they code for proteins with totally dissimilar functions. For example, Nobel-prize-winning work done in Dallas by Brown and Goldstein involved the receptors for low density lipoproteins. These are proteins on the surface of cells that allow entry to cholesterol. They are vital to normal fat metabolism. Brown and Goldstein studied the receptor molecule and found that a portion contains a gene sequence exactly the same as 'epidermal growth factor,' a growth stimulatory protein. There is absolutely no basis that anyone could have made for predicting this a priori. It doesn't really make sense why proteins should be constructed as patchwork from other preexisting proteins.
"It makes very good sense, however, in terms of the theory of evolution if we think of natural selection as taking advantage of whatever happens to be handy at the time. In fact, the theory of evolution predicts that molecules would be made over the same way that anatomical structures are. They are taken advantage of by natural selection and made over for entirely new tasks. I might also mention parenthetically that this observation demolishes the 'unlikelihood' objection to evolution. Complex structures in biology don't arise de novo; they evolve from pre-existing structures.
"You could argue that there is no reason why a creator couldn't do that, too. Phillip Johnson has stated that God could design living creatures in any fashion he wished, including the use of natural selection. But if you accept the notion of a God who pulls out odds and ends of biological systems and throws them together (sometimes ineptly), this is a long ways from the omnipotent creator usually considered in this context. If you analyze the question through the principle of Occam's Razor, and look for the simplest hypothesis, it is easiest to envision the process of the development of living systems through natural selection. It makes sense. It works.
"When we test hypotheses in biology, we are always asking, does this function or property have selective value? Does a structure or molecule increase the chances of survival for the particular organism, for the particular living system that we happen to be investigating? If it doesn't seem to, why not? Where does this lead us? To new, previously unknown functions? A cornucopia of information has appeared in the last few years in the field of molecular biology that I believe overwhelmingly supports the principles of evolution through natural selection."
-- "Response to William A. Dembski," by K. John Morrow, Jr.
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Thank you, gunnysgt, for singlehandedly debunking the central claim of "intelligent design theory [sic]."
I knew you had it in you, old chum. Will wonders never cease.