Leaf fall occurs in a tree when there is an increase in the concentration of . . . . . .

  • A
    Auxins
  • B
    Abscisic acid
  • C
    Cytokinins
  • D
    Gibberellins

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Similar Questions

Abscisic acid causes efflux of . . . . . . ions from guard cells and brings about closure of stomata.

The formation of the abscission zone can be induced by which of the following?

Which hormone is present in the fruit pulp,seed coat,and resting buds?

Dormancy of seeds is broken by ethylene,whereas it is induced by:

Gibberellin-mediated amylase formation during the germination of cereal grains is inhibited by:

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