The term is "Livebearers" and the answer is "yes they are".
Guppys are special fishes that DO NOT lay eggs. They give birth to young.
No. If you exclude the length of the tail (caudal) fin in some male guppys, under normal circumstances, female guppys grow to around double the size of male guppys
No
no
No
Poecilia reticulata
no
mainly red.
guppys are tropical fish. they require a heater, and 1 gallon is to small for a heater
yes
... if the guppies are big enough ;)
Bettas will eat baby guppys as will most other fish, but in general, male Bettas will only fight with other male Bettas. They do not fight with other species of fish