Iron is an essential mineral needed by the body to produce hemoglobin, a protein in red blood cells that carries oxygen.
Iron supplements are often recommended to help increase hemoglobin levels in individuals with mild iron-deficiency anemia.
Design an investigation to find out the effect of daily iron supplements on blood hemoglobin levels.
Your answer should include experimental details and be written in written in full sentences and paragraphs.
55 exam-style questions on Edexcel IGCSE Biology Transport. Each one has a worked solution and a mark scheme showing where the marks go.