A plant continues producing new leaves for many years. An animal has adult stem cells that replace worn-out blood cells.
Which statement explains both observations?
Some specialised cells lose their nuclei before becoming stem cells.
Some unspecialised cells remain able to divide and form specialised cells.
All unspecialised cells stop dividing once the organism becomes adult.
All specialised cells remain able to form every other type of cell.
46 exam-style questions on Edexcel GCSE Biology 2.2 Stem cells, covering 2.2.1 Function of stem cells and meristems and 2.2.2 Benefits and risks of stem cells. Each one has a worked solution and a mark scheme showing where the marks go.