NEET 2025, Biology Q36: Plant Growth Regulators
NEET2025Biology
Q.
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.
Choose the option with all correct statements.
- A
B, D, E only
- B
A, B, C only
- C
A, C, E only
- D
A, D, E only
Solution
Checking each statement:
- (A) Correct — auxins can induce parthenocarpy (e.g. in tomato).
- (B) Correct — PGRs both promote (auxin, GA, cytokinin) and inhibit (ABA, ethylene in some contexts) growth.
- (C) Correct — redifferentiation requires prior dedifferentiation of mature cells into meristematic ones.
- (D) Incorrect — ABA is a growth inhibitor.
- (E) Incorrect — apical dominance suppresses lateral bud growth.
A, B and C are correct.
Concept behind this question
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