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Question:

Function of filiform apparatus is to: Recognize the suitable pollen at stigma; Stimulate division of generative cell; Produce nectar; Guide the entry of pollen tube

Produce nectar

Stimulate division of generative cell

Recognize the suitable pollen at stigma

Guide the entry of pollen tube

Solution:

Synergid cell wall forms filiform apparatus at the micropylar end. Filiform apparatus is the extension of the synergids beyond apex of embryo sac. It helps in entry of pollen tube in the synergids. Thus, the correct answer is option D.