The table shows the number of bacteria in a culture at four times.
Table: The number of bacteria in a culture at four times
| Time / minutes | Number of bacteria |
|---|---|
| 0 | 300 |
| 40 | 1200 |
| 80 | 4800 |
| 120 | 19 200 |
What is the mean division time of the bacteria in this culture?
10 minutes
20 minutes
40 minutes
80 minutes
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.