Class 12 Biology — Chapter 13: Biodiversity and Conservation
90 practice questions · 30 Easy · 30 Medium · 30 Hard
Practise Class 12 Biology Chapter 13, "Biodiversity and Conservation", with 90 NCERT-aligned multiple-choice questions. The set is split into 30 Easy, 30 Medium and 30 Hard questions, so you can warm up on the fundamentals and then push into the exam-level problems that separate top scorers in CBSE Board exams and NEET UG.
"Biodiversity and Conservation" is one of the chapters where diagram-based recall, terminology and NCERT line-by-line accuracy really pays off. Each MCQ on this chapter is timed and uses exam-grade marking (+2 correct, −1 wrong, 0 skipped), training the same accuracy-under-pressure that real papers demand. Every question carries a short explanation, so a wrong answer becomes a quick lesson rather than a dead end — the fastest way to close gaps before a test.
Use this chapter as targeted revision: attempt the Easy set first to confirm your basics on Biodiversity and Conservation, then move to Medium and Hard to test application and problem-solving. Your accuracy, streaks and XP save automatically, and the chapter feeds into your overall Class 12 Biology mastery score. A few sample questions are shown below; sign in free to practise all 90.
Key concepts: Biodiversity and Conservation (Class 12 Biology)
This chapter covers the levels and patterns of biodiversity, its importance, the causes of loss, and strategies for conservation.
- Levels of biodiversity
- Genetic, species and ecological (ecosystem) diversity together make up biodiversity.
- Patterns
- Diversity is highest in the tropics and decreases towards the poles; the species–area relationship is described by a curve/line on a log scale.
- Importance of biodiversity
- Provides ecosystem services, resources and stability; the 'rivet popper' hypothesis stresses each species' role.
- Causes of loss
- The 'Evil Quartet': habitat loss and fragmentation, over-exploitation, alien species invasion, and co-extinctions.
- Conservation strategies
- In-situ (national parks, sanctuaries, biosphere reserves, hotspots) and ex-situ (zoos, botanical gardens, seed banks).
💡 Exam tips for Biodiversity and Conservation
- Distinguish in-situ (on-site: parks, sanctuaries, hotspots) from ex-situ (off-site: zoos, seed/gene banks) conservation.
- Remember the 'Evil Quartet' as the four main causes of biodiversity loss, with habitat loss the biggest.
Sample questions
Three levels of biodiversity:
Standard hierarchy.
Zoos and seed banks are:
Outside natural habitat.
Major causes of biodiversity loss ("Evil Quartet"):
Edward Wilson's framework.
Biodiversity and Conservation — FAQs
What are the key concepts in Class 12 Biology Biodiversity and Conservation?+
This chapter covers the levels and patterns of biodiversity, its importance, the causes of loss, and strategies for conservation. Key ideas include Levels of biodiversity, Patterns, Importance of biodiversity, Causes of loss, Conservation strategies.
What does Class 12 Biology Chapter 13 (Biodiversity and Conservation) cover on XamBaaz?+
It covers 90 NCERT-aligned MCQs on "Biodiversity and Conservation" — 30 Easy, 30 Medium and 30 Hard — each with a timed quiz and an instant explanation, suitable for CBSE Board exams and NEET UG.
Are these "Biodiversity and Conservation" questions free to practise?+
Yes — sign in with Google to practise "Biodiversity and Conservation" free. Full unlimited access is ₹999/year (limited-time launch price), with no per-chapter charges.
How should I revise "Biodiversity and Conservation" for the exam?+
Start with the Easy quiz to confirm your fundamentals, then attempt Medium and Hard for application-level practice. Review each explanation, retry the questions you miss, and track your accuracy on this chapter until it is consistently high.
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