NEET · Biology · STD 11 - 13. Plant growth and development

Which one of the following is not a characteristic of plant cells in the phase of elongation ?

A New cell wall deposition
B Cell enlargement
C Increased vacuolation
D Large conspicuous nuclei

Verified Solution

Answer & Solution

Correct Answer

(D) Large conspicuous nuclei

Step-by-step Solution

Detailed explanation

(D) Large conspicuous nuclei
The period of growth is generally divided into three phases: meristematic, elongation, and maturation.
The cells in the meristematic phase are rich in protoplasm and possess large conspicuous nuclei. Their cell walls are primary in nature, thin, and cellulosic with abundant plasmodesmatal connections.
The cells in the phase of elongation are characterised by increased vacuolation, cell enlargement, and new cell wall deposition.
Therefore, large conspicuous nuclei are a characteristic of meristematic cells, not cells in the phase of elongation.

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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