alleryGrape growers spray a PGR to lengthen the bunch stalks. It is a:
AAbscisic acid
BEthylene gas
CGibberellin
DCytokinin
Answer & Solution
Correct answer: C. Gibberellin
1. Gibberellins lengthen the axis of a plant.
2. That is used on grape stalks.
3. So the spray is a gibberellin.
_Source: syllabus Biology, Chapter 15, Plant Growth and Development._
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