Simple:
Leave out the word, thought, idea, consept of EVOLUTION in them!
Just talk about what IS; not what might, could, should, oughtta BE!!!
Wat would you define as "what is" in biology?
Can't be names of things, those're based on evolutionary relationships these days. So, taxonomy's out.
Can't be comparative anatomy, that's based on presumed evolutionary relationships.
Straight anatomy, maybe physiology. So once we get past the toe bone is connected to the foot bone, dicussion becomes kind of limited.