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ICSE Class 10 Biology Question 6 of 10

Chemical Coordination in Plants — Question 10

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Question 10

The hormone which accelerates senescence (ageing) and abscission of leaves is :

  1. IAA
  2. GA3
  3. ABA
  4. GA1
Answer

ABA

Reason — Abscisic Acid (ABA) is the hormone which accelerates senescence (ageing) and abscission of leaves. It is a growth inhibitor.