Plant Hormones · Botany

Which plant hormone helps plants respond to gravity?

  1. Auxin
  2. Ethylene
  3. Gibberellin
  4. Cytokinin
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Correct answer: Auxin

Auxin distribution in plant tissues enables plants to respond to gravity, a phenomenon known as gravitropism. It causes differential growth in roots and shoots.

Difficulty: Medium Question 9 of 20

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