A scientist took a small sample of the wall of a cow's stomach. The scientist counted 200 cells in the sample. The table shows the results.
Table: The number of each type of cell counted in a sample taken from the wall of a cow's stomach
| Type of cell | Number of cells counted |
|---|---|
| Muscle cell | 168 |
| Gland cell | 24 |
| Epithelial cell | 8 |
| Total | 200 |
Calculate the percentage of the cells counted that were muscle cells.
The scientist concluded that the sample was mostly muscular tissue. Give one piece of evidence from the table that supports this conclusion.
The sample also contained gland cells and epithelial cells. Explain what this shows about the wall of the stomach.
Give one reason why the scientist counted 200 cells and not 20 cells.
19 exam-style questions on AQA GCSE Biology 2.1 Principles of organisation, covering 2.1 Principles of organisation. Each one has a worked solution and a mark scheme showing where the marks go.