1. The problem involves understanding the percentage of time a cell spends in each major stage of the cell cycle, specifically the M phase and Interphase. 2. The cell cycle consists mainly of two stages: Interphase and M phase. Interphase includes cell growth, metabolism, DNA replication, and preparation for mitosis. M phase includes mitosis and cytokinesis. 3. The pie chart shows that the M phase occupies a smaller segment, while Interphase occupies the majority of the cycle time. 4. To find the percentage of time spent in each stage, we use the formula: $$\text{Percentage} = \left(\frac{\text{Time in stage}}{\text{Total cell cycle time}}\right) \times 100$$ 5. Important rules: - The total percentage must add up to 100%. - Interphase is generally the longest phase, often about 90% of the cycle. - M phase is shorter, about 10% of the cycle. 6. Given the descriptions: - Interphase: cell growth, metabolism, DNA replication, aging, and clearing dead matter. - M phase: spindle fiber synthesis, mitosis, and cytokinesis. 7. Therefore, the cell spends approximately 90% of its time in Interphase and 10% in M phase. Final answer: - Interphase: 90% - M phase: 10%