A horticultural scientist compares two treatments on melon flowers.
One group is hand-pollinated and sprayed with water. A second group is enclosed in pollen-proof covers and sprayed with gibberellin before the flowers open. All other conditions are identical.
| Treatment | Flowers tested | Fruits formed | Fruits containing seeds |
|---|---|---|---|
| Hand-pollinated and sprayed with water | 60 | 51 | 49 |
| Covered and sprayed with gibberellin | 60 | 44 | 0 |
Which conclusion is supported?
the hand-pollinated flowers formed seedless melons, but fewer fruits formed than in the covered group
the pollen-proof covers stopped all fruit development in the gibberellin-treated flowers
the covered, gibberellin-treated flowers formed seedless melons, but fewer fruits formed than after hand pollination
the covered, gibberellin-treated flowers formed seeded melons, but fewer fruits formed than after hand pollination
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.