It sounds to me as if you have to come up with another way to discipline, that he doesn't find funny. Biting is a pretty easy one, I think; he can't bite you if he's not near you, so you say "Ouch, that hurts" and walk away. If you make it impossible to do the offensive behavior, you get the point across.
Throwing food on the floor, well... that one is harder. I think all kids go through it. For your son, might it mean he is all done? If he does it for fun, you can just say "hey, if you're throwing food on the floor that means you're all done," take the food away, wash his hands, meal is over. He can always eat again later.
But I think that one of our most important jobs as parents is to de-escalate as the child escalates, and to maintain a calm, consistent environment. It will only get harder as he approaches 2 and really tests your limits. Being very calm and stating a rule or consequence often works better than giving a child any kind of show, which could very well be entertaining, and seems to be for Jake!
Children do grow out of annoying habits, but more often we teach them to help themselves by giving them skills to control their own behavior. We cannot count on annoying behaviors to be eliminated by nature. We can show kids that their actions have consequences, and that when we enforce rules we are not "mean," but providing them with a safe, healthy environment. If you think about your two examples, biting is not safe, food on the floor is not healthy. Easy reasons for the rules.
I tell my children, now 3 and 5 so old enough to understand, that rules are for their own safety and I need to be able to trust that anything I say will be listened to because it could be a matter of life and death. Obviously your son can't hear that right now, but it could be your attitude in developing rules and your reactions to them. Kids are more likely to respect rules if they can see that they are designed to keep them safe and healthy than if they seem arbitrary at all. Why not throw food on the floor, it's fun! Oh... it makes all my food disappear and then I get hungry. That's not fun. See?
One last thing-- if your kids are going to be close in age and he will be pushing two when your next baby is born, you will be glad to have lain down patterns of rule-consequence being calmly and consistently stated, and not to have knock down drag out fights with your child. It should never come down to your will against his, because he is a child and you are not equals.
I hope this helps. Please email me if you need more specifics. Good luck!