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

Which is the most common type of embryo sac in angiosperms ?

A Tetrasporic with one mitotic stage of divisions
B Monosporic with three sequential mitotic divisions
C Monosporic with two sequential mitotic divisions
D Bisporic with two sequential mitotic divisions

Verified Solution

Answer & Solution

Correct Answer

(B) Monosporic with three sequential mitotic divisions

Step-by-step Solution

Detailed explanation

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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Match the hominids with their correct brain size

\((a)\) Homo habilis	\((i)\) \(900\; \mathrm{cc}\)
\((b)\) Homo neanderthalensis	\((ii)\) \(1350\; \mathrm{cc}\)
\((c)\) Homo erectus	\((iii)\) \(650-800\; \mathrm{cc}\)
\((d)\) Homo sapiens	\((iv)\) \(1400\; \mathrm{cc}\)

Select the correct option. \((a)\quad (b)\quad (c)\quad (d)\)

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