Chapter Overview & Weightage
- Marks in Boards: 6–10 marks (usually 2–3 questions + diagram)
- Repeated Topics: Flower structure, pollination types, double fertilization, endosperm development, apomixis, parthenocarpy.
- Difficulty: Moderate to high • Heavy on diagrams (flower LS, embryo sac, pollen grain) + processes.
- Trend (2021–2025): 1 diagram-based (3–5 marks) + 1 long answer (5 marks) on double fertilization/pollination + MCQs on events.
Most Important & Repeated Questions (2021–2025)
- Repeated 5–6 times: Draw a labelled diagram of L.S. of a flower. Label 8–10 parts. (5 marks)
- Repeated 4–5 times: Explain double fertilization with diagram. Name the products formed. (5 marks)
- Repeated 4 times: Differentiate self-pollination and cross-pollination. Give advantages of cross-pollination. (3 marks)
- Repeated 3–4 times: What is apomixis? Give examples. How is it different from sexual reproduction? (3 marks)
- Repeated 3 times: Explain structure of mature pollen grain with diagram. (3 marks)
- Repeated 3 times: Describe development of female gametophyte (embryo sac) with diagram. (5 marks)
- Repeated 2–3 times: What is parthenocarpy? Give examples of parthenocarpic fruits. (2 marks)
- Assertion-Reason (2023–2025): Assertion: Double fertilization is unique to angiosperms. Reason: It leads to formation of endosperm and embryo. (Both true, reason explains – repeated 2x)
Important Keywords & Concepts to Memorize
- Stamen, anther, filament, pistil, stigma, style, ovary, ovule, microsporangium, megasporangium, pollen grain, generative cell, tube cell, embryo sac, synergids, antipodals, central cell, polar nuclei, double fertilization, triple fusion, endosperm, apomixis, parthenocarpy, pollination (self/cross), autogamy, geitonogamy, xenogamy, outbreeding devices, pollen-pistil interaction.
Exam Strategy for Chapter 2 (2026 Boards)
- Focus: Diagrams (L.S. flower, pollen grain, embryo sac) – practice 3 daily
- High-scoring: Double fertilization (5 marks) + labelled diagram
- Time: 8–10 minutes per 5-mark question (diagram + explanation)
- Tip: Label 8–10 parts in flower diagram – neatness = full marks
- Repeated: Apomixis vs parthenocarpy difference (2–3 marks)
This is Chapter 2 complete PYQ analysis.
If you want Chapter 3 or any other chapter, just say the chapter number or name.