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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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Which hormone would a grower use to increase the number of seedless grapes produced commercially?
When would a nurseryman choose to apply a cytokinin spray rather than auxin?
How can auxin be used to produce seedless fruit (parthenocarpy) in some crops?
Which method best reduces spread of hormone residue contamination between treated and untreated fruit?
What is the primary reason farmers might use a hormone-based weedkiller (synthetic auxin) rather than mechanical weeding?
A horticulturist applies auxin paste to graft unions. Which effect is most likely and beneficial?
Which practice uses auxin to reduce the number of side branches and produce a cleaner single-stemmed ornamental?
Why might commercial tomato growers spray ethene on green tomatoes after harvest?
Why are hormone treatments carefully timed in commercial orchards (e.g., just after flowering or at bud swell)?
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 gibberellins applied to some grape varieties commercially?