mdcat logical reasoning MCQ #484

A plant's stem bends toward a light source. What is the primary growth regulator?

mdcat logical reasoning MCQ #484

  1. Question 1

    Q1. A plant's stem bends toward a light source. What is the primary growth regulator?

    • A) Auxin redistribution
    • B) Gibberellin synthesis
    • C) Ethylene production
    • D) Abscisic acid accumulation

    Answer: Auxin redistribution

    Explanation: Auxins redistribute to shaded sides, causing differential growth. Other hormones have different roles.