Researchers tested xylem from two genetically different willow plants. Equal lengths of stem containing the same total cross-sectional area of xylem were connected to a water supply at the same pressure.
| Plant | Mean percentage of each end wall remaining (%) | Time taken for 2.0 cm³ of water to pass through the stem (s) |
|---|---|---|
| P | 5 | 40 |
| Q | 35 | 64 |
Using the data, explain which plant has xylem that is better adapted for carrying water.
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.