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A-Level Biology OCR A

Plants Respond Growth Dark Growing Grow Upwards Rapidly

In darkness, plants exhibit rapid upward growth, believed to be driven by gibberellins, as they seek light for photosynthesis.

When growing in the dark, plants respond by rapidly growing upwards to find light for photosynthesis, a response believed to be mediated by gibberellins.

Front How do plants respond to growth in the dark?
Back Growing in the dark:
  • Grow upwards rapidly in an attempt to reach the light in order to photosynthesise 
  • Evidence suggests that gibberellins are responsible for this

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