MHT CET · BIOLOGY · STD 12 - 1. Reproduction in Lower and Higher Plants

The correct sequence of developmental stages of embryo in angiosperms is______.

A Octant \(\rightarrow\) horse shoe shaped \(\rightarrow\) heart shaped \(\rightarrow\) globular
B Octant → heart shaped → horse shoe shaped → globular
C Globular \(\rightarrow\) octant \(\rightarrow\) heart shaped \(\rightarrow\) horse shoe shaped
D Octant \(\rightarrow\) globular \(\rightarrow\) heart shaped \(\rightarrow\) horse shoe shaped

Verified Solution

Answer & Solution

Correct Answer

(D) Octant \(\rightarrow\) globular \(\rightarrow\) heart shaped \(\rightarrow\) horse shoe shaped

Step-by-step Solution

Detailed explanation

Embryonal initial undergoes three successive mitotic division and forms octant. Further development forms globular embryo. Further enlargements of hypocotyls and cotyledons forms heart shaped and horse shoe shaped structure.

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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