Mutation is not the driving force behind natural selection. Natural genetic variation is.
A ***** has a half-dozen puppies. Each one is different. They are not all equally equipped to deal with the particular circumstances they find themselves in. Those who, by simple variation, are better suited, pass on their individual traits to more offspring than the others.
This is how most change occurs.
A ***** has a half-dozen puppies. Each one is different. They are not all equally equipped to deal with the particular circumstances they find themselves in. Those who, by simple variation, are better suited, pass on their individual traits to more offspring than the others.
This is how most change occurs.