Question

Read the following statements on plant growth and development:
A. Parthenocarpy can be induced by auxins. B. Plant growth regulators can be involved in promotion as well as inhibition of growth. C. Dedifferentiation is a pre-requisite for re-differentiation. D. Abscisic acid is a plant growth promoter. E. Apical dominance promotes the growth of lateral buds.

• A. A, C, E only
• B. A, D, E only
• C. B, D, E only
• D. A, B, C only

Hint:

Auxins = Parthenocarpy. Abscisic acid = Inhibitor. Apical dominance = Suppresses lateral buds.

Answer 1

The Correct Option is D

A. True: Auxins facilitate parthenocarpy, which is fruit formation without fertilization.
B. True: Plant growth regulators (hormones) can either promote or hinder growth, contingent upon the specific hormone and its concentration.
C. True: Dedifferentiation, characterized by the loss of specialized structure and function, is a prerequisite for cells to re-differentiate into novel cell types.
D. False: Abscisic acid functions as a growth inhibitor and is implicated in stress responses such as drought tolerance.
E. False: Apical dominance operates by suppressing the growth of lateral buds, thereby promoting the elongation of the main stem.