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STD 11 - 13. Plant growth and development — BIOLOGY STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceBIOLOGYSTD 11 - 13. Plant growth and development1 Mark
MCQ
Grass coleoptile tip bend towards source of light because
  • A
    It likes the sun
  • B
    It is heavy
  • C
    It needs darkness
  • ✓
    Due to some secretion from tip
✓

Answer

Correct option: D.
Due to some secretion from tip
d
(d)Darwin and his son found that bending movement of coleoptile of Canary grass was due to exposure of tip of unilateral light. Boysen-Jensen found that the tip produces a chemical which was later named auxin.

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