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STD 11 - 13. Plant growth and development — BIOLOGY STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceBIOLOGYSTD 11 - 13. Plant growth and development1 Mark
MCQ
Leaf fall occurs on abscission layer is formed when the content of
  • A
    Auxin increases
  • ✓
    Auxin decreases
  • C
    Abscisic acid decreases
  • D
    Gibberellic acid decreases
✓

Answer

Correct option: B.
Auxin decreases
b
(b)Auxin inhibits abscission of leaves and fruits. Abscission layer is produced when the auxin content falls below a minimum.

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