Two groups of vertical shoots are illuminated from the left. Group P receives a chemical that prevents auxin moving from one side to the other. Group Q receives the same solvent without the chemical. Both groups remain alive and grow.
Which result would support the role of auxin redistribution in phototropism?
P grows straight while Q bends towards the light
both groups grow straight at the same average rate
both groups bend towards light by the same amount
P bends towards light while Q grows straight upwards
46 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.