A student investigates the effect of the direction of light on shoot growth.
Which measurement is the most suitable dependent variable?
the angle of the shoot after two days
the volume of water supplied to the shoot
the temperature of the air by the shoot
the distance of the lamp from the shoot
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.