Which of the following physiological effects is caused in plants by gibberellic acid?
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a
Shortening of genetically tall plants.
b
Elongation of genetically dwarf plants.
c
Rooting in stem cuttings.
d
Yellowing of young leaves.
answer is B.
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Detailed Solution
Gibberellins promote internodal elongation in genetically dwarf plants like maize, Pisum, Vicia faba etc. Here only phenotype get change while genotype remains same.