User talk:SouthWriter/sandbox/An atheist's objections/@comment-2020851-20100705234323

@ Destroyanator: The finch able to crack the nut and eat it survives to have a child. So the genetics that gave it a capable beak are passed on to their cihldren. The ones that aren't capable to break the nut die and don't have children. So the DNA that gives them a lacking beak doesn't get passed on to the next generation. After many many many generations every finch is born with the genetics that allow it to crack the nut.