A distribution depot divides unripe mangoes from one delivery into three equal groups. The groups are exposed to ethene for different lengths of time and are then stored under the same conditions.
| Time exposed to ethene in hours | Mean time to ripen in days |
|---|---|
| 0 | 15 |
| 2 | 11 |
| 6 | 8 |
Using the group exposed for 0 hours as the reference, give the percentage reduction in mean ripening time for the 2-hour treatment and for the 6-hour treatment. Give both answers to the nearest whole percent.
27%27\%27% and 47%47\%47%
73%73\%73% and 53%53\%53%
36%36\%36% and 88%88\%88%
27%27\%27% and 20%20\%20%
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.