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Q.126) 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) (B, D, E only)

B) (A, B, C only)

C) (A, C, E only)

D) (A, D, E only)

Answers (1)

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A. Parthenocarpy can be induced by auxins – Correct.
Auxins can induce the development of seedless fruits (parthenocarpy).

B. Plant growth regulators can be involved in promotion as well as inhibition of growth – Correct.
For example, auxins and gibberellins promote growth, while abscisic acid inhibits it.

C. Dedifferentiation is a pre-requisite for re-differentiation – Correct.
Dedifferentiated cells regain the ability to divide and later redifferentiate into new tissues.

D. Abscisic acid is a plant growth promoter – Incorrect.
Abscisic acid is actually a growth inhibitor, not a promoter.

E. Apical dominance promotes the growth of lateral buds – Incorrect.
Apical dominance suppresses the growth of lateral buds, due to auxin produced by the apical bud.

Hence, option (2) is correct.

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Saniya Khatri

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