In a typical flower, germinating pollen grains pass through several pa

In a typical flower, germinating pollen grains pass through several parts of the gynoecium before they reach the ovule. A list of the parts of gynoecium is given below in different combinations. Choose the combination that represents the correct sequence of pollen tube pathway/journey :

Style, Stigma, Ovary

Stigma, Style, Ovary

Pistil, Stigma, Ovary

Ovary, Pistil, Style

Answer is Right!

Answer is Wrong!

This question was previously asked in

UPSC NDA-1 – 2021

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The correct answer is (B) Stigma, Style, Ovary.

In the typical process of fertilization in flowering plants, a pollen grain lands on the stigma (the receptive tip of the pistil/gynoecium). If compatible, the pollen grain germinates and grows a pollen tube. This pollen tube grows down through the style (the stalk connecting the stigma to the ovary) and eventually reaches the ovary, where it enters an ovule to deliver the male gametes. Thus, the correct sequence of the pollen tube pathway is Stigma -> Style -> Ovary.

The pistil or carpel is the entire female reproductive part of a flower, typically consisting of the stigma, style, and ovary. Starting the sequence with “Pistil” is not detailing the pathway *through* the parts of the gynoecium.

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