A researcher applies auxin gels with concentrations H and L to opposite sides of the growing regions of an upright pea seedling. The seedling receives light evenly from above.
| Auxin concentration | Mean increase in root cell length in µm | Mean increase in shoot cell length in µm |
|---|---|---|
| L | 44 | 25 |
| H | 16 | 71 |
The researcher wants both the root and the shoot to curve to the left.
Which allocation of concentration H should the researcher use?
H on the right side of the root and the left side of the shoot
H on the right side of the root and the right side of the shoot
H on the left side of the root and the left side of the shoot
H on the left side of the root and the right side of the shoot
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.