A botanic garden needed to raise seedlings of a threatened mountain plant.
Two batches, each containing 80 dormant seeds, were kept under identical conditions. Before sowing, one batch was treated with gibberellin and the other batch received no hormone.
The results after 20 days are shown in the table.
| Treatment | Mean time taken to germinate in days | Number of seeds germinated after 20 days |
|---|---|---|
| No hormone | 12.4 | 46 |
| Gibberellin | 6.9 | 71 |
Describe the differences between the two batches shown by these results.
Include numerical evidence in your answer.
105 exam-style questions on Edexcel GCSE Biology 6.3 Plant hormones, covering 6.3.1 Plant hormones and tropisms and 6.3.2 Commercial uses of plant hormones. Each one has a worked solution and a mark scheme showing where the marks go.