Young mustard seedlings are grown upright in a dark cabinet. A lamp on the right remains on continuously for 24 hours. The shoots bend towards the lamp.
Which statement explains why?
Auxin moves to the illuminated side and causes cells there to elongate more slowly.
Auxin moves to the illuminated side and causes cells there to elongate more rapidly.
Auxin moves to the shaded side and causes cells there to elongate more rapidly.
Auxin moves to the shaded side and causes cells there to elongate more slowly.
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.