Fibrinogen as Evidence for Biochemical Complexity?
Jerry Coyne admits biochemical complexity must underlie morphological complexity. (Check out the discussion at Dr. Coyne’s bolg: http://t.co/wQ3LCXG2) However, in his acclaimed book, Why Evolution is True, the only specific evidence he provides to demonstrate biochemical complexity is to hypothesize that a common ancestor of sea cucumbers and vertebrates had a gene that was later co-opted in vertebrates as fibrinogen. (p. 131-3) How much does this explain?
The following two Biochemical Pathways Chart interactive thumbnails, when printed, cover 27 square feet; they are packed with cellular complexities. And, all of the molecules and pathways need an evolutionary explanation. Go online yourself and see the breathtaking complexity of biochemistry that still needs an explanation. The only evidence Coyne presents in his book is an imagined gene that supposedly led to fibrinogen. To find fibrinogen click on section V2; that will bring up the third chart.
What does this lack of evidence do for the evolutionary claims for the development of morphological complexity?