What is the main function of abscisic acid in plants?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → Inhibiting growth
Abscisic acid is the plant hormone that inhibits growth. It keeps seeds and buds dormant, makes the stomata close during water shortage and causes leaves to wilt.
Why the other options are incorrect
Option (1) Promoting cell division — Incorrect. This is the work of cytokinins, found in fruits and seeds.
Option (2) Increasing cell length — Incorrect. This is the work of auxins, made at the shoot tip.
Option (4) Growth of the stem — Incorrect. Stem growth is promoted by gibberellins.