If you don't have fundamental biology, all the branches are going to whither.

And whither I go ye know, and the way ye know.

Evolution isn't just a story or a theory on the corner of science, evolution is the fundamental idea in biology.

Evolution is the fundamental idea in all of life science - in all of biology.

How now, wit! Whither wander you?

Biology sometimes reveals its fundamental principles through what may seem at first to be arcane and bizarre.