B1 - Commercial Use of Plant Hormones. 0.0 / 5 ? BiologyHealthy livingGCSEOCR Created by: RachelcfxCreated on: 29-04-16 18:13 What useful things can plant hormones be used for? (3) Killing weeds, growing cuttings, ripening fruit. 1 of 5 Explain how plant hormones can be used as selective weedkillers... Only affect the broad leaved plants by distrupted their normal growth patterns which kills them leaving crops untouched. 2 of 5 Explain how plant hormones can be used growing from cuttings... A cutting = part of a plant that has been cut off it. If you add rooting powder (contains plant hormones) to a cutting they produce new plants. 3 of 5 Explain how plant hormones can be used in controlling the ripening of fruit... Plant hormones delay the ripening of fruits during transport/on the plant. Allows fruit to be picked unriped. 4 of 5 What is gibberellin? A hormone that allows a seed to germinate (start growing) 5 of 5
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