A treatment destroys many of a patient's bone marrow stem cells. The number of red blood cells falls several weeks later.
Which explanation links these observations?
Fewer stem cells join together to form larger replacement blood cells.
Fewer stem cells divide and differentiate to replace lost blood cells.
Fewer stem cells absorb and transport oxygen to existing blood cells.
Fewer stem cells cause existing blood cells to divide by meiosis.
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.