KCET · BIOLOGY · STD 11 - 13. Plant Growth and Development

Apical dominance in plants is due to the presence of __________

A Gibberellins in the lateral bud
B Cytokinins in the leaf apex
C Abscisic acid at the shoot tip
D Auxins at the shoot tip

Verified Solution

Answer & Solution

Correct Answer

(A) Gibberellins in the lateral bud

Step-by-step Solution

Detailed explanation

(A) Gibberellins in the lateral bud,
Apical dominance occurs due to auxins produced at the shoot tip, which suppress the growth of lateral buds.

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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