A researcher investigates water movement through xylem in the stem of a plant. In one group of plants, lignin deposition in the xylem walls is prevented.
Explain the role of lignin in the xylem of the other plants and predict the effect of preventing lignin deposition on water movement through the stem.
282 exam-style questions on AQA GCSE Biology 1.1 Cell structure, covering 1.1.1 Eukaryotes and prokaryotes, 1.1.2 Animal and plant cells, 1.1.3 Cell specialisation, 1.1.4 Cell differentiation, 1.1.5 Microscopy, and 1.1.6 Culturing microorganisms. Each one has a worked solution and a mark scheme showing where the marks go.