yes
you cant .....
By levelling up
It takes about 2 days or more depending on the zombie.
Mix 2 regular zombie, zombot and any kinda normal size zombie with your zompot
You can plant it for 5 brains, or you can mix 2 garden zombies in a zombie pot.
a zombee is a zombie made from mixing any 2 fertalizing zombies in the zombie pot and it has a 50 percent chance at fertalizing
Nothing
To get that farm banner on Zombie Farm, you've got to win an invasion and have some luck with the loot you get.
You cant. Thats in Plants vs. zombies, not zombie farm.
shot it with an arrow
You buy it from the store.