A) ethylene
B) gibberellin
C) abscisic acid
D) cytokinin
Correct Answer: B
Solution :
Gibberellins promotes internodal elongation (belting) just prior to flowering in beet, cabbages and many plants with rosette habit. Gibberellins cause fruit like apple to elongate and improve its shape. Spraying sugarcane with gibberellins increases the length of the stem. Spraying juvenile conifers with gibberellins hastens the maturity period, thus leading to early seed production.
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