Apical Dominance and Gravitropism · NCERT Biology

Which experiment demonstrated the role of auxin in apical dominance?

  1. Darwin’s phototropism experiment
  2. Boysen-Jensen’s experiment
  3. Went’s agar block experiment
  4. Miller and Urey experiment
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Correct answer: Went’s agar block experiment

Went’s agar block experiment showed that a chemical substance from the tip promotes growth. This substance was later identified as auxin.

Difficulty: Medium Question 11 of 20

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