Biology 0610 · IGCSE · Tropic responses

Tropic responses — practice question

A light source is positioned on one side of a plant that is growing. What is the correct explanation of auxin’s role in shoot growth?

  • AAuxin is equally distributed in response to light and stimulates cell elongation.
  • BAuxin is equally distributed in response to light and inhibits cell elongation.
  • CAuxin is unequally distributed in response to light and stimulates cell elongation.
  • DAuxin is unequally distributed in response to light and inhibits cell elongation.

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