Class 9 Biology Chapter 13: Biodiversity and Conservation Previous Year Questions (2020–2025)
Biodiversity and Conservation is a critical chapter in Class 9 Biology (Chapter 13, NCERT) that explores the incredible variety of life on Earth and the urgent need to protect it. Every year, CBSE boards include 2–4 questions from this chapter in final exams and periodic tests, covering topics like biodiversity hotspots, extinction threats, and conservation strategies. This page compiles authentic previous year questions (2020–2025) with step-by-step solutions to help you master ecosystem diversity, endangered species, and sustainable practices. Whether you're preparing for periodic exams, half-yearly, or board exams, these real CBSE questions will sharpen your understanding and boost your confidence.
Your child's private AI tutor — trained on NCERT.
3-day free trial · ₹1 to start · Cancel anytime.
What Is Biodiversity? CBSE Class 9 Definition & Examples
Biodiversity refers to the variety of all living organisms—plants, animals, fungi, and microorganisms—in a specific ecosystem or the entire biosphere. NCERT Chapter 13 emphasizes three levels: genetic diversity (variation within a species), species diversity (number of different species), and ecosystem diversity (variety of habitats). India is a megadiverse nation with over 45,000 plant species and 91,000 animal species. Previous year questions often ask students to define biodiversity, name hotspots like the Western Ghats, and explain why it matters for human survival and agriculture.
Biodiversity Hotspots in India: 2020–2025 Exam Focus
CBSE frequently tests knowledge of India's four biodiversity hotspots: Western Ghats, Himalayas, Indo-Burma, and Sundaland. Each hotspot contains endemic species found nowhere else. The Western Ghats alone host 30% of India's plant species. Previous year papers include map-based questions, short-answer items asking students to list characteristics of hotspots, and case studies about conservation efforts in these regions. Understanding the location, flora, fauna, and threats to each hotspot is essential for board exams and periodic assessments.
Causes of Biodiversity Loss: Habitat Destruction & Climate Change
NCERT Chapter 13 identifies five major causes: habitat destruction (deforestation, urbanization), overexploitation (hunting, illegal trade), pollution (pesticides, plastics), invasive species, and climate change. Exam questions ask students to explain how each factor reduces species numbers and ecosystem function. Real 2021–2024 questions have included scenarios where students must identify which cause is affecting a specific ecosystem (e.g., coral bleaching from warming oceans). Understanding the interconnection between human activities and biodiversity loss is crucial for 3-mark and 5-mark board questions.
Conservation Strategies: In-Situ & Ex-Situ Methods Explained
NCERT teaches two main conservation approaches: in-situ (protecting species in their natural habitat via national parks, sanctuaries, and biosphere reserves) and ex-situ (protecting species outside their habitat via zoos, seed banks, botanical gardens). India has 106 national parks, 536 wildlife sanctuaries, and 18 biosphere reserves. Previous year questions (2020–2025) frequently ask students to differentiate between these methods, explain why both are needed, and cite examples like Project Tiger or Project Elephant. This topic typically appears as a 5-mark question in board exams.
Endangered & Endemic Species: CBSE Exam Patterns
Questions on endangered species (Indian rhinoceros, Bengal tiger, Asian elephant) and endemic species (Nilgiri tahr, Malabar civet) appear regularly. CBSE expects students to know the difference: endangered species are at risk of extinction, while endemic species are naturally found only in one region. Previous year papers include identification questions, explanations of why species become endangered, and conservation measures. Students should be able to name 4–5 Indian endangered species and state their habitat and threats, essential for 2–3 mark questions.
CBSETUTOR.ai: Your AI Tutor for Biodiversity & Conservation Mastery
CBSETUTOR.ai is India's #1 AI tutor trusted by lakhs of CBSE families for Biology. Our platform provides 24/7 live doubt resolution, chapter-wise previous year question banks, AI-powered mock tests, and personalized study plans aligned with NCERT 2024–25. Students across India use CBSETUTOR.ai to practice biodiversity questions, understand complex concepts like ecosystem services, and ace board exams. Get instant feedback, Hindi-medium support, and expert explanations without visiting coaching centers—all on one trusted platform.
Ecosystem Services & Human Dependence: Board Exam Focus
NCERT Chapter 13 highlights how biodiversity provides ecosystem services: pollination, water purification, carbon sequestration, food, medicines, and climate regulation. Exam questions ask students to explain why loss of biodiversity threatens human survival and economic stability. A 2023 board question asked students to list three ecosystem services provided by forests and explain the impact of deforestation. This concept bridges ecology and socio-economic themes, making it relevant for 3–5 mark questions in final exams.
Sustainable Development & Conservation: Case Studies from Previous Papers
CBSE includes case-based questions linking biodiversity conservation to sustainable development goals. Previous year papers (2022–2025) have featured scenarios like ecotourism in national parks, organic farming to reduce pesticide pollution, and community-based conservation programs. Students are expected to analyze trade-offs between development and conservation, propose solutions, and evaluate effectiveness. These higher-order thinking questions appear as 5-mark case studies or source-based items, requiring students to apply NCERT concepts to real-world situations.
Biodiversity & Genetic Engineering: Recent Exam Trends
Newer CBSE papers (2024–2025) increasingly link Chapter 13 to genetic diversity and GMO crops. Questions test whether students understand that while genetic engineering can improve crop yield, it may reduce genetic diversity in nature. Previous papers have asked students to evaluate the pros and cons of GM crops for biodiversity. Understanding seed banks, germplasm conservation, and the importance of traditional crop varieties for food security connects Chapter 13 to agricultural sustainability, a trending CBSE theme.
How to Solve 2–5 Mark Biodiversity Questions: Exam Strategy
For 2-mark questions, define the term clearly and give one example (e.g., 'Biodiversity = variety of species in Western Ghats'). For 3-mark questions, explain a concept + provide two supporting examples + mention importance. For 5-mark questions, structure answers with definition, types/categories, real examples, impacts, and solutions. Practice labeling biodiversity hotspot maps, creating comparison tables (in-situ vs. ex-situ), and writing short paragraphs on conservation success stories. Use previous year papers (2020–2025) to identify recurring topics and expected answer patterns.
Frequently asked questions
What is the definition of biodiversity for Class 9 CBSE exams?+
Biodiversity is the total variety of living organisms (plants, animals, fungi, microbes) in an ecosystem or biosphere. It includes genetic diversity (variation within species), species diversity (number of species), and ecosystem diversity (habitat variety). NCERT Chapter 13 emphasizes India's role as a megadiverse nation with over 45,000 plant and 91,000 animal species.
Which are the four biodiversity hotspots of India mentioned in NCERT?+
India's four biodiversity hotspots are: 1) Western Ghats (30% of plant species), 2) Himalayas, 3) Indo-Burma, and 4) Sundaland. Each is characterized by high endemism and is threatened by deforestation and urbanization. CBSE board questions frequently ask students to name and locate these hotspots on a map.
How do in-situ and ex-situ conservation differ in CBSE Biology?+
In-situ conservation protects species in their natural habitat (national parks, sanctuaries, biosphere reserves like Project Tiger). Ex-situ conservation protects species outside their habitat (zoos, seed banks, botanical gardens). CBSE expects students to understand why both methods are necessary for comprehensive biodiversity protection and long-term species survival.
What are endangered and endemic species? Name three examples.+
Endangered species are at risk of extinction due to habitat loss or overexploitation (Indian rhino, Bengal tiger, Asian elephant). Endemic species naturally occur only in one region (Nilgiri tahr, Malabar civet, Andaman wild pig). CBSE questions test the difference and require students to know conservation status and habitat of major Indian species.
Is CBSETUTOR.ai free, or do I need to pay for practice questions?+
CBSETUTOR.ai offers a free trial with access to sample questions, chapter summaries, and AI doubt resolution. Premium membership unlocks unlimited previous year questions, full-length mock tests, and personalized study plans. Hindi-medium students get equal support. Sign up free today to explore our biodiversity question bank and ace your exams.
Does CBSETUTOR.ai provide Hindi-medium support for Biology Chapter 13?+
Yes, CBSETUTOR.ai fully supports Hindi-medium Class 9 Biology students. Our platform offers chapter notes, previous year questions, and live tutoring sessions in Hindi. All NCERT content is translated accurately, and our AI tutor explains concepts in your preferred language 24/7 without any extra charge.
What types of questions appear in CBSE Board exams on Biodiversity?+
CBSE includes 2-mark definition questions, 3-mark concept explanation with examples, 5-mark case studies/diagrams, and map-based hotspot identification. Questions test understanding of causes of biodiversity loss, conservation strategies, endangered species, and ecosystem services. Previous year papers (2020–2025) show consistent focus on in-situ/ex-situ methods and India-specific examples.
How can I practice biodiversity previous year questions to score 90+ in Class 9 Biology?+
Use CBSETUTOR.ai to access 2020–2025 previous year questions with solutions, attempt full-length mock tests weekly, review answer patterns, and strengthen weak topics. Spend 30 minutes daily on question practice, label hotspot maps, create comparison tables, and use AI doubt resolution for instant help. Consistent practice boosts both speed and accuracy in board exams.
Related resources
Online Class 9 Biology Tutor in Mumbai — AI-Powered, 24/7 CBSE SupportOnline Class 9 Biology Tutor in Bengaluru — AI-Powered CBSE Coaching Available 24x7Class 9 Biology Chapter 6: Tissues – Solved Previous Year Questions (2020-2025)Class 9 Biology Chapter 5: The Fundamental Unit of Life — Important Questions with AnswersOnline Class 9 Biology Tutor in Kolkata – 24/7 AI-Powered CBSE CoachingExpert Online Class 9 Biology Tutor in Pune – NCERT-Aligned, 24/7 AI CoachingOnline Class 9 Biology Tutor in Ahmedabad – 24/7 CBSE Expert HelpClass 9 Mathematics Chapter 5 'I'm Up and Down, and Round and Round' Previous Year Questions (2020–2025)
Keep learning — related guides
Mathematics
Class 9 Mathematics Chapter 3 Number Play: Previous Year Questions with Complete Solutions
Mathematics
Class 9 Mathematics Chapter 2: Lines and Angles Previous Year Questions (2020–2025)
Mathematics
Class 9 Mathematics Chapter 1 Patterns in Mathematics Previous Year Questions (2020–2025)
French
Class 9 French Chapter 14 Le Monde Francophone · Culture — Previous Year Questions (2020–2025)
French
Class 9 French Chapter 13 Le Temps et le Climat Previous Year Questions (2020–2025)
French
Class 9 French Chapter 12 Les Sports, les Loisirs et le Temps Libre Previous Year Questions (2020–2025)
Ready to give your Class 9 child the tutor that never sleeps?
CBSETUTOR.ai covers every chapter in the Class 9 NCERT syllabus — Maths, Science, Social Science, English, Hindi and more. 24×7. Patient. Unlimited. 3-day free trial.
Start your child's 3-day free trial →