A technician cut equal-length sections from the growing region immediately behind the tips of young bean shoots. Equal numbers of sections were placed in each of two auxin solutions for 24 hours. All other conditions were kept the same.
| Group | Auxin concentration in mg dm⁻³ |
|---|---|
| P | 0.10 |
| Q | 0.30 |
Neither concentration inhibits growth.
Predict which group will have the greater mean increase in length and explain 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.