The above picture represents the different stages a cell goes through in its "lifetime." each phase is characterized by specific events. cells that are fully differentiated spend most of their time in g0. what event or events characterize this phase? a) it is the period of cell death. all activities stop. b) it is a resting phase where the cell has left the cycle and has stopped dividing. c) this is the first growth phase within interphase and the number of proteins increases. d) this is a period of protein synthesis and rapid cell growth to prepare the cell for mitosis.