KCET · BIOLOGY · STD 12 - 1. Sexual Reproduction in Flowering Plants

Identify the correct order of events in pollen-pistil interaction from the options given below.
I. Release of male gametes into the embryo sac
II. Deposition of pollen grains on stigma
III. Entry of pollen tube into embryo sac
IV. Development of pollen tube
V. Entry of pollen tube into the ovule

A V → IV → III → II → I
B IV → III → II → I → V
C II → IV → V → III → I
D II → IV → III → V → I

Verified Solution

Answer & Solution

Correct Answer

(C) II → IV → V → III → I

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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Identify the correct order of events in pollen-pistil interaction from the options given below.I. Release of male gametes into the embryo sac II. Deposition of pollen grains on stigma III. Entry of pollen tube into embryo sac IV. Development of pollen tube V. Entry of pollen tube into the ovule

Step-by-step Solution

Identify the correct order of events in pollen-pistil interaction from the options given below.
I. Release of male gametes into the embryo sac
II. Deposition of pollen grains on stigma
III. Entry of pollen tube into embryo sac
IV. Development of pollen tube
V. Entry of pollen tube into the ovule