A newspaper reports that stem cells have been shown to cure paralysis. A scientist says the report is not yet justified. Which statement best supports the scientist?
Stem cells cannot differentiate into nerve cells, so paralysis cannot be treated
Stem cells are only found in embryos, so there are too few of them for treatment
Stem cells are always rejected by the patient, so the treatment cannot ever work
Stem cell treatments for paralysis are still being trialled, so the risks are unknown
63 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.