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ICSE Class 10 Biology Question 1 of 30

Solved Sample Paper 4 — Question 1

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Question

Question 1(i)

Adrenaline is a 'stress hormone' found in humans similarly the 'stress hormone' of plant is

  1. ethylene
  2. abscisic acid
  3. cytokinins
  4. auxin
Answer

abscisic acid

Reason — Abscisic acid is the plant hormone that helps the plant to survive in unfavourable conditions. They cause closure of stomata and also inhibit growth.

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