Not that much.
Out goes comparative anatomy, much of taxonomy, parasitology, much physiology, etc.
Correlations would have to be presumed due to Divine action and not possible relationships, adaptive changes and variations would be required to stop at some magical point of reduced or impaired viablity of offspring prior to mutual infertility, genetic studies would have similar blank walls.
I could go on.
None of that goes out.
Correlations would have to be presumed due . . .
Correlations can be (and should be) recognized without presumptions. Why would you need evolution to determine that a particular drug affects a rat this way, a man this way and a fly that way? Or that a fish can live in this environment but a man can't & vice-versa?