Biology Quote by Bob Beasley

The facts of microevolution [change within the species] do not suffice for an understanding of macroevolution [theorized change from one species to another].

— Richard Goldschmidt

“Universally accepted, microevolution has limits for what it can explain. These limits do not reach the center where the controversy lies - the Thesis…

— Jon Morrison

“Genetics might be adequate for explaining microevolution, but microevolutionary changes in gene frequency were not seen as able to turn a reptile into a…

— Scott F. Gilbert

The decisive step in evolution, the first step toward macroevolution, the step from one species to another, requires another evolutionary method than that of…

— Richard Goldschmidt

It's impossible by micro-mutation to form any new species.

— Richard Goldschmidt

“Change is inevitable. Evolution, however, is optional.”

— Tony Robbins

The more highly adapted an organism becomes, the less adaptable it is to any new change.

— Ronald Fisher

In the broadest sense, evolution is merely change, and so is all-pervasive; galaxies, languages, and political systems all evolve. Biological evolution ... is change…

— Douglas J. Futuyma

We now have a quarter of a million fossil species, but the situation hasn't changed much... We have even fewer examples of evolutionary transition…

— David M. Raup

Evolution - evolutionary change - does not happen quickly.

— Jack Horner

“With the little changes that happen with reproduction, the configuration of your DNA and your genes can change for you and others in the…

— Bill Nye

“I am suggesting here that organisms have a built-I capability of adapting to their environment. I am suggesting that to the extent that evolution…

— Lee Spetner