Researchers compared two samples of cells from the lining of an airway. They placed mucus containing particles of dirt on each sample under the same conditions.
| Sample | Mean number of hair-like structures per cell | Distance moved by mucus in 5 minutes (mm) |
|---|---|---|
| A | 180 | 30 |
| B | 0 | 0 |
Explain how the results show that the cells in sample A are specialised to remove dirt from the airway.
194 exam-style questions on OCR GCSE Biology 2.1 Supplying the cell, covering 2.1.1 Transport across cell membranes, 2.1.2 Mitosis and the cell cycle, 2.1.3 Importance of cell differentiation, and 2.1.4 Stem cells. Each one has a worked solution and a mark scheme showing where the marks go.