During seed germination its stored food is mobilized by

A \(ABA\)
B gibberellin
C ethylene
D cytokinin.

Verified Solution

Answer & Solution

Correct Answer

(B) gibberellin

Step-by-step Solution

Detailed explanation

(b) : Gibberellins are plant growth substances chemically related to terpenes and occurring naturally in plants and fungi. They promote elongation of stems, \(e.g.\), bolting in cabbage plants, and the mobilization of food reserves in germinating seeds and are influential in inducing flowering and fruit development.

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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Genera	Phylum
(a) Ophura	(i) Mollusca
(b) Physalia	(ii) Platyhelminthes
(c) Pinctada	(iii) Echinodermata
(d) Planaria	(iv) Coelenterata