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Biology Medium FPSC PPSC NTS Uploaded: 14 Jul 2026

What is the term for the bending of a plant toward light called?

  • A Geotropism
  • B Phototropism
  • C Hydrotropism
  • D Thigmotropism
Correct Answer: Option B — Phototropism
Explanation:
Phototropism is the growth response of a plant toward a light source caused by unequal distribution of auxin making cells on the shaded side elongate more than those on the lit side.
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