Cell elongation in plants is caused by ....................... .
A
Auxin
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B
Gibberellin
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C
Florigen
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D
Traumatin
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Solution
The correct option is A Auxin A- Auxin is a plant hormone produced in the stem and root tip that promotes cell elongation, stem and root growth. Auxins have four characteristic effects on plant growth: 1) Stimulating shoot elongation 2)Controlling seedling orientation 3)Stimulates root branching 4) Promoting fruit development.