Chapter Overview & Weightage
- Marks in Boards: 4–6 marks (usually 1–2 questions)
- Repeated Topics: Asexual vs Sexual reproduction, modes of asexual reproduction, life span, pre-fertilization events, vegetative propagation.
- Difficulty: Easy to moderate • Mostly theory, definitions & differences.
- Trend (2021–2025): 1 MCQ/assertion-reason + 1 short answer (2–3 marks) or 1 long answer (5 marks) on modes of reproduction.
Most Important & Repeated Questions (2021–2025)
- Repeated 4–5 times: Differentiate between asexual and sexual reproduction with examples. (2–3 marks)
- Repeated 3–4 times: Explain different modes of asexual reproduction (binary fission, budding, fragmentation, vegetative propagation). (3–5 marks)
- Repeated 3 times: What is vegetative propagation? Give examples of natural and artificial methods. (3 marks)
- Repeated 2–3 times: Define life span. Give examples of organisms with different life spans (e.g., butterflies vs humans). (2 marks)
- Repeated 2 times: What are pre-fertilization events? Explain gametogenesis and syngamy. (3 marks)
- Assertion-Reason (2023–2025): Assertion: Asexual reproduction is common in unicellular organisms. Reason: It involves only mitosis. (Both true, reason explains – repeated 2x)
Important Keywords & Concepts to Memorize
- Asexual reproduction, sexual reproduction, gametes, zygote, mitosis, meiosis, binary fission, budding, fragmentation, regeneration, spore formation, vegetative propagation, runner, rhizome, bulb, tuber, grafting, cutting, layering, tissue culture, life span, senescence, pre-fertilization events, gametogenesis, syngamy, embryogenesis, parthenogenesis, apomixis.
Exam Strategy for Chapter 1 (2026 Boards)
- Focus: Definitions & differences (asexual vs sexual, natural vs artificial propagation) – 2–3 marks
- Practice: Draw labelled diagrams of binary fission & budding (if asked in 3–5 marks)
- Time: 5–7 minutes per 3-mark question
- Tip: Quote examples (e.g., Amoeba – binary fission, Hydra – budding) in every answer
- High-scoring: Vegetative propagation methods + advantages (3 marks frequently)
This is Chapter 1 complete PYQ analysis.
If you want the same for Chapter 2 or any other chapter, just say the chapter number or name.