Final answer:
If environmental signals do not permit entry into the cell cycle, the cell will not proceed into interphase. It may be arrested or undergo apoptosis if repair is not possible. Environmental signals, such as growth factors, are necessary for cell division and growth.
Step-by-step explanation:
Environmental signals play a crucial role in regulating the cell cycle. If the environmental signals do not permit entry into the cell cycle, the cell will not proceed into interphase.
It may be arrested, awaiting DNA repair or other fixes, or it may undergo apoptosis if repair is not possible. This is because environmental signals, such as growth factors, are necessary to stimulate cell division and growth. Without these signals, the cell cycle cannot progress.