A fruit wholesaler stores peaches in two rooms at the same temperature and humidity. In one room, the air is continually replaced with fresh air. In the other room, the air is not replaced. The peaches in the room supplied with fresh air remain unripe for longer.
Suggest why continually replacing the air delays the ripening of the peaches.
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.