[Dataman]

On the other hand, I can't imagine how it'd be possible to be a biologist without understanding how evolution works.

Biology is biology regardless of evolution.
Bio (life) ology (the study of) is just that. Evo deals only with it's imagined origin. You think, perhaps, no one, not Mendel or physicians, could understand biology before darwin?

[Right Wing Professor]

Biology is biology regardless of evolution.

Biology without evolution is birdwatching. It's the collection of observations with no possibility of gaining fundamental understanding.