Multiple choice

Which of the following hormones causes delay in senescence?

  1. Indole butyric acid

  2. Gibberlic acid

  3. Cytokinin

  4. Abscisic acid
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Cytokinins are plant hormones that delay senescence (aging) by promoting cell division, protein synthesis, and nutrient mobilization. They keep leaves green and slow aging. Abscisic acid promotes senescence and dormancy, gibberellic acid promotes stem elongation, and indole butyric acid (IBA) is an auxin involved in rooting.

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