A student used paper chromatography to separate the different pigments extracted from flower petals. They were provided with the following materials:
Describe how the student could use these materials to separate the pigments in the extract.
When using solvent C, the student separated four distinct pigment spots. When they repeated the method under identical conditions but using a different solvent, D, they separated five distinct pigment spots. Explain the difference between these two results.
21 exam-style questions on AQA A Level Biology Investigating diversity. Each one has a worked solution and a mark scheme showing where the marks go.