A scientist looked at 100 cells from tissue P and 100 cells from tissue Q. Five of the cells from tissue P were in mitosis and 20 of the cells from tissue Q were in mitosis. The cell cycle takes the same total time in both tissues. What can be concluded from this information?
Mitosis lasts four times as long in tissue Q as in tissue P
Mitosis lasts four times as long in tissue P as in tissue Q
Cells in tissue Q have four times as many chromosomes as cells in tissue P
Cells in tissue P have four times as many chromosomes as cells in tissue Q
63 exam-style questions on AQA GCSE Biology 1.2 Cell division, covering 1.2.1 Chromosomes, 1.2.2 Mitosis and the cell cycle, and 1.2.3 Stem cells. Each one has a worked solution and a mark scheme showing where the marks go.