A scientist placed two marks around the growing region of a young shoot. The shoot was kept upright with light reaching it evenly from above.
A microscope was used to count the cells in one row between the marks.
| Time in hours | Distance between the marks in mm\text{mm}mm | Number of cells between the marks |
|---|---|---|
| 0 | 1.5 | 30 |
| 8 | 2.1 | 30 |
A student concluded that the distance between the marks increased because the cells divided.
Explain why the results do not support the student's conclusion.
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.