[Campbell Biology P.902] Which of the following is NOT one of the three parts of the ethylen... | Practice Question

Which of the following is NOT one of the three parts of the ethylene-induced triple response in pea seedlings?

  • A: Slowing of stem elongation
  • B: Thickening of the stem
  • C: Increased root growth
  • D: Curvature leading to horizontal stem growth

Explanation

The triple response to ethylene consists of three parts: slowing of stem elongation, thickening of the stem, and a curvature that causes the stem to start growing horizontally. Increased root growth is not mentioned as part of this response.