MHT CET · BIOLOGY · STD 12 - 7. Plant Growth and Mineral Nutrition

In plants, lower branches are larger than upper branches due to _____________ .

A Axillary buds near apical bud receive auxin in more concentration.
B Lower axillary buds receive auxin in minute concentration
C Lower axillary buds receive auxin in more concentration
D Auxin formed in apical bud does not get transported towards lower axillary bugs.

Verified Solution

Answer & Solution

Correct Answer

(B) Lower axillary buds receive auxin in minute concentration

Step-by-step Solution

Detailed explanation

Lower branches are larger than upper branches as they receive very less amount of auxin. As a result apical dominance is lowered and profuse branching occurs.

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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