The growth of a coleoptile towards unilateral light source is due to

The growth of a coleoptile towards unilateral light source is due to
  • A.
    rapid rate of photosynthesis
  • B.
    unequal distribution of auxin
  • C.
    the effect of geotropism
  • D.
    the effect of photolysis
Correct Answer: Option B
Explanation
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