"Evolutionary biologists are not at a loss to accomodate the evidence that the rate of evolution is dependent on the rate of mutation . We now understand that , in a finite world , where variation and time are not infinitely abundant , the non-randomness of variation ( long recognized by geneticists ) is expected to have a crucial influence on the course of evolution ."
"Variation does tend to have a pattern . It is usually drawn as a bell curve , with the top portion being the most common variation on a trait ."
"variation"
"Variation does tend to have a pattern . It is usually drawn as a bell curve , with the top portion being the most common variation on a trait ."