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Phototropic curvature is the result of uneven distribution of:

  1. A
    Auxin
  2. B
    Gibberellin
  3. C
    Phytochrome
  4. D
    Cytokinins

Solution & Step-by-step Explanation

Auxin is responsible for phototropism. When light shines on one side of a plant tip, auxin migrates to the shaded side. The higher concentration of auxin on the dark side stimulates greater cell elongation, causing the plant to curve toward the light.

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Phototropic curvature is the result of uneven distribution of:
A
Auxin
B
Gibberellin
C
Phytochrome
D
Cytokinins

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Plant Growth and DevelopmentHormonesAuxin

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