A drop containing auxin is placed on one side of the growth zone of a young oat shoot. This produces a higher auxin concentration on that side.
The shoot is upright and receives light equally from all directions.
Which statement describes the expected effect on the shoot?
Cells on the side given auxin elongate less, causing the shoot to bend towards that side
Cells on the side given auxin elongate more, causing the shoot to bend towards that side
Cells on the side given auxin elongate more, causing the shoot to bend away from that side
Cells on both sides elongate equally, causing the shoot to continue growing straight
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.