A chemical prevents a horizontal root from developing different auxin concentrations on its upper and lower sides. The root remains alive and both sides continue to elongate equally.
Which prediction is correct?
the root grows longer and develops normal downward curvature
the root stops growing and develops reversed upward curvature
the root grows longer but shows no downward curvature
the root stops growing but develops normal downward curvature
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.