Just a Hypothetical…

Anyone know how well an apple retains fingerprints – let’s just say if it were once gripped firmly and then thrown? And, if they can trace the fingerprints to you, could you sand off your fingerprints beforehand and dispute it?
Also, hypothetically, if you threw something at a chimpanzee at a zoo and knocked him unconscious and they traced it back to you, what could you be charged with? I mean there’s no “assault against a chimp” in the books, is there? I’m not doing hard time over a chimp, I tell you!
Anyway, all hypothetical, but please get some answers back quick.