Question: 173. 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 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, B, C only
(2) A, C, E only
(3) A, D, E only
(4) B, D, E only
Answer: Option (1)
Explanation:
Auxins can induce parthenocarpy, which is the development of fruits without fertilization.
Plant growth regulators may promote growth at certain concentrations and inhibit growth at higher concentrations.
Dedifferentiation refers to the reversion of differentiated cells to a meristematic state.
Redifferentiation occurs when these meristematic cells differentiate again, so dedifferentiation is a prerequisite.
Abscisic acid is a growth inhibitor and stress hormone, not a growth promoter.
Apical dominance suppresses the growth of lateral buds due to the presence of auxins in the apical bud.
Therefore, statements A, B, and C are correct.
Hence, the correct answer is Option (1).