A gardener dips the cut ends of stem cuttings into a powder containing a plant hormone before planting them. Which statement gives the hormone in the powder and the reason for using it?
Ethene in the powder makes the cuttings flower sooner.
Gibberellin in the powder makes the leaves grow larger.
Auxin in the powder makes roots grow from the cut stem.
Auxin in the powder stops the cuttings losing water.
84 exam-style questions on OCR GCSE Biology 3.2 Coordination and control – the endocrine system, covering 3.2.1 Principles of hormonal coordination and control, 3.2.2 Roles of thyroxine and adrenaline, 3.2.3 Hormones in human reproduction, 3.2.4 Interactions of reproductive hormones, 3.2.5 Hormones in contraception, 3.2.6 Hormones in reproductive technologies, 3.2.7 Plant hormones in growth and coordination, 3.2.8 Effects of plant hormones, and 3.2.9 Uses of plant hormones. Each one has a worked solution and a mark scheme showing where the marks go.