A shop stores unripe plums before putting them on sale. The plums must remain unripe until day 6 and become ripe on day 6. No more than 5% of the plums should be damaged during storage and handling.
The shop tests three storage schedules.
| Schedule | Ethene treatment during days 0 to 4 | Ethene treatment from the start of day 5 | Plums damaged (%) | Day on which plums become ripe |
|---|---|---|---|---|
| A | Ethene removed | Ethene added | 3 | 6 |
| B | Ethene not removed | No ethene added | 12 | 4 |
| C | Ethene removed | No ethene added | 4 | 9 |
Evaluate which storage schedule the shop should use.
87 exam-style questions on AQA GCSE Biology 5.4 Plant hormones, covering 5.4.1 Control and coordination and 5.4.2 Use of plant hormones (HT only). Each one has a worked solution and a mark scheme showing where the marks go.