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Use Of Plant Hormones (ht Only) (GCSE Biology)

The following is a GCSE Biology test covering 'Use Of Plant Hormones (ht Only)' from the broader topic Homeostasis And Response. The test is geared towards the AQA exam board style syllabus.
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What is a potential downside of using auxin-based herbicides extensively on farmland?
Which of the following best describes why plant hormone use is included in HT (higher tier) biology?
Applying auxin just below a plant’s shoot tip can prevent growth of side shoots (apical dominance). What is a practical use of this effect in horticulture?
Why are hormone treatments carefully timed in commercial orchards (e.g., just after flowering or at bud swell)?
Which is an environmental benefit of using plant hormones to improve crop yields?
Which statement best describes how gibberellins are used to improve malting and brewing of barley?
Which of the following is a use of ethene in the cut-flower industry?
Which hormone would a grower use to increase the number of seedless grapes produced commercially?
Which hormone promotes cell elongation on the shaded side of a shoot causing phototropism?
Which method best reduces spread of hormone residue contamination between treated and untreated fruit?
Which plant hormone is commonly used as a rooting powder to encourage cuttings to form roots?