Can anyone please help me :)

During binary fission, what events must occur before the cell splits into two new cells?

Achemical that is released by an animal as a signal to other members of the same species is called a pheromone. t or f

Which does not describe a physical change happening to water? water evaporating in the sun water reacting with nitrogen gas water freezing and being broken apart with a knife water heating up on a stove