A student measures the response of roots and shoots to an auxin concentration. Relative elongation without added auxin is 100% for both tissues.
Table
| Tissue | Relative elongation with auxin |
|---|---|
| Root | 40% |
| Shoot | 160% |
If this concentration occurs on only the left side of each vertical organ, which response is expected?
the root bends left and the shoot bends right
the root bends right and the shoot bends left
the root bends right and the shoot bends right
the root bends left and the shoot bends left
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.