Why?
If we cut open a lemur and found chloroplasts, cell walls, and plant pathways it would be impossible.
The fact that the lemur wasn't green would be a big problem for physics.
If you turned on a flashlight, then opened it up and found it was a stereo speaker inside or a bar of soap, that'd be a big problem for physics, not just something that disproved the light or electrical theories.
If you are simply talking about some similarities in sequences between a lemur and tree that statistically are greater than between a bat and a lemur, that would not necessarily be outside of theory.