Apical Dominance and Gravitropism · NCERT Biology

In roots, higher auxin concentration on the lower side causes:

  1. Increased cell elongation
  2. No change in growth
  3. Inhibition of cell elongation
  4. Cell division without elongation
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Correct answer: Inhibition of cell elongation

High auxin concentration inhibits cell elongation in roots. This causes the root to bend downward toward gravity.

Difficulty: Medium Question 9 of 20

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