A scientist has four reference cultures of bacteria.
| Reference culture | Mean division time in minutes |
|---|---|
| W | 10 |
| X | 20 |
| Y | 30 |
| Z | 40 |
An unidentified culture starts with 6 bacteria. After 4 hours, the culture contains 24 576 bacteria.
The conditions remain suitable and the bacteria divide at a constant mean division time.
Which reference culture has the same mean division time as the unidentified culture?
Culture X
Culture Z
Culture W
Culture Y
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.