The cat will suffer a loss of testosterone, which will make it act more like a female cat.
An entire (not neutered) male cat is called a Tom cat.
no
Male cats have anal glands that can get clogged, especially if the cat has not been neutered. A Vet can "express" the clog, which will make the cat less odoriferous (smelly). However, you should get the cat neutered, because the smell will lessen and likely not occur again. It can reoccur in an unfixed male cat.Note: Same is true for male dogs.
A neutered male can get your cat pregnant up to 30 days after he's been neutered. So if the cat just was neutered, keep him away from your female.
An unneutered cat is a 'Tom', but once neutered they are called a 'Gib.'
only if he has been neutered
It depends on where you take them
Neutered
A castrated male cat is usually just called a "neutered" or "fixed" male.
have them neutered
A male cat is usually called a Tom. This term is usually used only for unneutered males.
Just warning it off its territory.