A scientist grows bacteria in a vessel containing liquid nutrient medium. The conditions remain suitable throughout the investigation, and the mean division time remains constant.
The table shows the number of bacteria at the start and after 144 minutes.
| Time after the start in minutes | Number of bacteria |
|---|---|
| 0 | 240 |
| 144 | 15 360 |
Calculate the mean division time during the first 144 minutes.
The culture continues to grow under the same conditions.
Calculate the number of bacteria in the culture 6 hours after the start.
Give your answer in standard form.
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.