Indeed, there has been no credible scientific challenge to the idea that evolution, the foundation of modern biology, explains the diversity of life on earth.
Research shows how evolution explains age of puberty, ScienceDaily, December 1, 2005.
This whole argument is that simple in my opinion, evolution has evidence and explains it quite nicely.
Since evolution so successfully explains why the biosphere is the way it is, why not apply the theory to the whole of creation?
Even the intelligent design movement, which argues that evolution alone cannot explain life's complexity, does not challenge the long history of the earth.
Dawkins concludes that evolution by natural selection can explain apparent design in nature.
"No, but evolution and human nature can explain that part."
It occurred to him that evolution could explain the similarities and differences between species.
And parallel evolution might explain the biped shape.
I, personally, don't feel that evolution explains the variety,and I would have said so on the survey.