Class NEET 2026 ALL Q #2056
COMPETENCY BASED
APPLY
4 Marks 2026 NTA-RE-NEET-2026 MCQ SINGLE
Which of the following in female gametophyte of an angiosperm helps in guiding the pollen tube for fertilizing the eggs?
(A) Polar nucleus
(B) Antipodals
(C) Synergids
(D) Central cells
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Correct Answer: C

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Detailed Solution

Step 1: Understanding the structure of the Embryo Sac

The mature female gametophyte (embryo sac) in angiosperms typically consists of 7 cells and 8 nuclei. These include three antipodal cells, two polar nuclei (in the central cell), one egg cell, and two synergids.

Step 2: Identifying the role of Synergids

The synergids are specialized cells located at the micropylar end of the embryo sac. They contain a specific cellular thickening called the filiform apparatus.

Step 3: Mechanism of Pollen Tube Guidance

The filiform apparatus present in the synergids secretes chemical substances (chemotropic factors) that attract and guide the pollen tube towards the egg cell for fertilization. Therefore, the synergids are responsible for this guidance.

Final Answer: Synergids

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Pedagogical Audit
Bloom's Analysis: This is an APPLY question because the student must apply knowledge of reproductive anatomy to explain a specific physiological function (pollen tube guidance).
Knowledge Dimension: CONCEPTUAL
Justification: The question tests the understanding of the functional relationship between specific cellular structures (filiform apparatus) and biological processes (fertilization).
Syllabus Audit: In the context of NEET, this is classified as COMPETENCY. This aligns with the NCERT Biology Class 12 curriculum, specifically the chapter on Sexual Reproduction in Flowering Plants, focusing on the functional morphology of the embryo sac.
||KEY:C

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