Any fish may fight/bite if they are in cramped conditions and/or poorly fed. Guppies are not regarded as fighters but may sometimes do a bit of fin nipping of any fish with long flowing fins including other guppies and Bettas.
That's how guppies usually behave. They may well have a bit of rivalry but they will do no real damage.
What are guppies
Male guppies chase pregnant female guppies because they are trying to mate with them and fertilize their eggs. This behavior is natural for guppies and is a part of their reproductive process.
yes.
Yes - there is virtually no limit to how many female guppies can live together.
They won't fight, they will try to avoid the males sometimes because the males constantly follow the female. They will fight if they want to. Males don't constanly follow the females. I have seen my guppies fight, but they wont kill each other. My guppies never fallow each other unless if they want to mate. It takes a couple of seconds to mate then they stop following each other.
Female guppies stay very plain to help with camouflage. Male guppies get color to attract females.
They usually don't, but guppies have differing personalities, with some being more aggressive than others.
Male guppies are considerably smaller than females of the same species.
Yes, because guppies will eat their newborn fry.
Don't own female guppies if you don't want youngsters.
Male guppies have a pointier anal fin and a bigger tail than the female and the female is larger than the male.