A technician prepared samples containing different proportions of the same bacterial suspension. The same volume of each sample was spread onto a separate agar plate, and all the plates were incubated under the same conditions.
| Proportion of the original suspension in the sample / % | Number of colonies |
|---|---|
| 100 | 96 |
| 50 | 48 |
| 25 | 25 |
| 12.5 | 12 |
| 6.25 | 6 |
Describe how the proportion of the original suspension in the sample is related to the colony count.
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.