Biodiversity and Conservation
CBSE · Class 12 · Biology
Step-by-step guide to study Biodiversity and Conservation in CBSE Class 12 Biology. Topics to cover, practice strategy, and time allocation.
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Learn the Theory
Read the textbook chapter carefully. Note down definitions, formulas, and key concepts.
Practice Problems
Solve textbook exercises and additional practice questions. There are 51 questions available for this chapter.
Revise & Test
Revise key formulas and concepts without looking at notes. Take a practice quiz to test your understanding. Mark weak areas for re-revision.
Spaced Revision
Revisit Biodiversity and Conservation after a week. Use flashcards for quick recall. Solve previous year questions from this chapter.
What to Focus On
- Biodiversity includes genetic, species, and ecological diversity.
- Genetic diversity occurs within a species.
- Species diversity refers to variety of species in a region.
- Described plant and animal species are slightly more than 1.5 million.
- Global species estimates range from 20 to 50 million in extreme cases.
- Robert May estimated about 7 million species globally.
- Species diversity is highest in the tropics.
- Tropics lie between 23.5° N and 23.5° S.
- Species richness decreases from equator to poles.
Common Mistakes to Avoid
Biodiversity means only the number of species in a region.
Genetic diversity, species diversity, and ecological diversity are interchangeable terms.
Biodiversity is highest near the poles because cold regions are less disturbed by humans.
Memory Tips
Three levels of biodiversity
Genetic diversity example with Rauwolfia vomitoria
Species diversity example from Western Ghats and Eastern Ghats
Ecological diversity example from India and Norway
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Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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Important Questions
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Formula Sheet
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Chapter Summary
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Concept Maps
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Syllabus
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