Apical Dominance and Gravitropism · NCERT Biology

The suppression of lateral buds by apical dominance occurs because auxin:

  1. Stimulates cytokinin synthesis in buds
  2. Directly destroys lateral bud tissue
  3. Blocks cytokinin action in lateral buds
  4. Halts photosynthesis in lateral buds
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Correct answer: Blocks cytokinin action in lateral buds

Auxin suppresses the growth-promoting effect of cytokinins in lateral buds. This inhibition maintains apical dominance.

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