NEET · Biology · STD 12 - 1. sexual reproduction in flowering plants

Perisperm differs from endosperm in

A being a diploid tissue
B its formation by fusion of secondary nucleus with several sperms
C being a haploid tissue
D having no reserve food.

Verified Solution

Answer & Solution

Correct Answer

(A) being a diploid tissue

Step-by-step Solution

Detailed explanation

(a) : Both perisperm and endosperm are nutritive layers. Perisperm is residual persistent nucellus of seed prior to fertilization while endosperm develops when one of the sperm cells fuses with two haploid polar nuclei. Thus perisperm is diploid while endosperm is a triploid tissue.

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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