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ZoologyNEET 2025Plant growth regulators: auxin, gibberellin, cytokinin, ethylene, ABA

Plant Growth and Development

Read the following statements on plant growth and development.

(A) Parthenocarpy can be induced by auxins.

(B) Plant growth regulators can be involved in the promotion as well as the inhibition of growth.

(C) Dedifferentiation is a pre-requisite for redifferentiation.

(D) Abscisic acid is a plant growth promoter.

(E) Apical dominance promotes the growth of lateral buds.

Choose the option with all correct statements:

  1. A.A, B, C only✓
  2. B.A, C, E only
  3. C.A, D, E only
  4. D.B, D, E only

Solution

Auxins induce parthenocarpy (A); growth regulators can promote or inhibit growth (B); cells must dedifferentiate before they can redifferentiate (C). Abscisic acid is a growth inhibitor, and apical dominance suppresses lateral buds. Hence A, B and C.

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