B1.2.6 Hormones and the control of plant hormones 0.0 / 5 ? BiologyCoordination and ControlGCSEAQA Created by: MaddiCreated on: 13-04-14 21:51 What stimuli do plants respond to? Plants are sensitive to light, gravity and moisture. 1 of 7 How to plants respond to their environment? Plant responses are brought about by plant hormones. 2 of 7 What is gravitropism? The response of a plant to gravity. 3 of 7 What is phototropism? The response of a plant to light. 4 of 7 Why do shoots bend towards the light? Unequal distribution of auxin causes unequal growth which results in bending of the shoot. 5 of 7 What effects does auxin have on root and shoot cells? High levels of auxin make shoot cells grow more but inhibit growth of root cells. 6 of 7 Why do farmers and gardeners use plant hormones? We can use plant growth hormones as weed killers and as rooting hormones on cuttings. 7 of 7
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