Scientists counted cells from growing flower buds of two plant species. The table shows the number of cells in each stage and the time taken for one complete cell cycle.
| Plant species | Cells in stage 1 | Cells in stage 2 | Cells in stage 3 | Time for one complete cell cycle in hours |
|---|---|---|---|---|
| R | 210 | 30 | 10 | 25 |
| S | 145 | 35 | 20 | 20 |
Calculate the percentage by which stage 2 lasts longer in species S than in species R.
Give your answer to 2 significant figures.
104 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.