The table shows mean cell elongation in a laboratory investigation.
Table
| Auxin treatment | Root cell elongation in mm | Shoot cell elongation in mm |
|---|---|---|
| Lower concentration | 4 | 2 |
| Higher concentration | 1 | 5 |
The higher concentration occurs on the lower side of a horizontal seedling. Which prediction follows?
the root bends upwards and the shoot bends upwards
the root bends upwards and the shoot bends downwards
the root bends downwards and the shoot bends downwards
the root bends downwards and the shoot bends upwards
46 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.