During an investigation into how light exposure affects leaf cells, a botanist measured the mean number of chloroplasts in cells from two regions of the same leaf. The results are shown in the table.
| Region of leaf | Mean number of chloroplasts per cell |
|---|---|
| Strongly lit region | 72 |
| Less brightly lit region | 24 |
Use the results to calculate the factor by which the mean chloroplast count in the strongly lit region exceeds the count in the less brightly lit region.
282 exam-style questions on AQA GCSE Biology 1.1 Cell structure, covering 1.1.1 Eukaryotes and prokaryotes, 1.1.2 Animal and plant cells, 1.1.3 Cell specialisation, 1.1.4 Cell differentiation, 1.1.5 Microscopy, and 1.1.6 Culturing microorganisms. Each one has a worked solution and a mark scheme showing where the marks go.