What phase of cellular division is most of the cells life?

Most of a cell's life is spent in the interphase, which is the phase between cell divisions. Interphase consists of three stages: G1 (growth), S (synthesis, where DNA is replicated), and G2 (preparation for mitosis). During this time, the cell grows, carries out its normal functions, and prepares for division, making interphase crucial for cell development and function.