What would happen if interphase didn't occur first ?

The cell would never be able to be in a the stage of the cell cycle where it is just doing its job (which would depend on its specialization). The other phases are all dedicated to replicating (dividing) the cell from one to two cells. Interphase allows the cell time to just preform the job (function) it was created to do.

The return of the wolf to yellowstone national park will probably affect the bird population to some degree, not significantly. while wolves will hunt birds when necessary, they prefer to hunt larger prey. the bird population will most likely only be affected when hunting is scarce for the wolves. birds of prey will also probably not be affected as much as other birds who spend more time on the ground hunting for food as the tend to spend more time in the air or in trees since they do not need to stay on the ground for long due to the nature of the way they hunt.

This movement is also referred to as  glacial plucking