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NTA Abhyas NEET2020BotanyPlant - Growth and DevelopmentPractice

Apical dominance in plants is caused by

Options

  1. Ahigh concentration of auxins in the terminal bud.
  2. Bhigh concentration of gibberellins in the apical bud.
  3. Chigh concentration of auxins in the lateral bud.
  4. Dabsence of auxins and gibberellins in the apical bud.

Correct answer

A. high concentration of auxins in the terminal bud.

Step-by-step solution

Apical dominance is the phenomenon in which main axis or terminal bud continuous to grow suppressing the growth of lateral bud. High concentration of auxin in the terminal bud promotes its growth and it increases ethylene formation in lateral bud which suppresses its growth.

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