Two groups of young plants of the same species were grown beneath an elevated walkway, where only weak daylight reached them. Each plant had six leaves and the same dry mass at the start.
| Group | Mean surface area of one leaf in cm² | Increase in dry mass after four weeks in g |
|---|---|---|
| S | 18 | 1.6 |
| L | 33 | 2.5 |
Suggest how the difference in leaf surface area could have caused the difference in the increase in dry mass.
74 exam-style questions on AQA GCSE Biology 2.3 Plant tissues, organs and systems, covering 2.3.1 Plant tissues and 2.3.2 Plant organ system. Each one has a worked solution and a mark scheme showing where the marks go.