A research team used cultured stem cells in a trial involving 10 patients whose tissue had been damaged. The outcomes after six months were:
| Outcome | Number of patients |
|---|---|
| Tissue showed improvement | 7 |
| No improvement in tissue | 3 |
The team wants to offer the treatment to every patient with this type of tissue damage.
Explain why the team should not do this yet. Use the data in your answer.
104 exam-style questions on AQA GCSE Biology 1.2 Cell division, covering 1.2.1 Chromosomes, 1.2.2 Mitosis and the cell cycle, and 1.2.3 Stem cells. Each one has a worked solution and a mark scheme showing where the marks go.