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Biodiversity and Conservation — Revision Notes

CBSE · Class 11 · Geography

Biodiversity and Conservation revision notes for CBSE Class 11 Geography: 4 topics in quick points. Part of the CBSE Class 11 Geography syllabus.

81 questions74 flashcards5 concepts

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Key Topics to Revise

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1. Meaning and Levels of Biodiversity

  • Biodiversity is the combination of bio meaning life and diversity meaning variety.
  • It is the number and variety of organisms found within a specified geographic region.
  • It includes variability within species, between species, and between ecosystems.
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2. Patterns of Biodiversity

  • Biodiversity is not evenly distributed across the earth.
  • It is consistently richer in the tropics.
  • As one moves toward the polar regions, species become fewer and populations larger.
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3. Importance of Biodiversity

  • Biodiversity has ecological, economic, and scientific roles.
  • Ecologically, species capture and store energy, decompose organic materials, cycle water and nutrients, fix atmospheric gases, and help regulate climate.
  • A diverse ecosystem is usually more stable and more productive.
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4. Causes of Biodiversity Loss

  • Human population growth has increased the rate of consumption of natural resources.
  • Over-exploitation and deforestation have accelerated species loss and habitat loss.
  • Natural calamities such as earthquakes, floods, volcanic eruptions, forest fires, and droughts damage flora and fauna.

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Full Notes

Key Concepts

Biodiversity is the variety of lifeGenetic diversity refers to variationSpecies diversity is the varietyEcosystem diversity refers to the varietyAreas rich in species diversity

Frequently Asked Questions

What are the important topics in Biodiversity and Conservation for CBSE Class 11 Geography?
Key topics in Biodiversity and Conservation include Meaning and Levels of Biodiversity, Patterns of Biodiversity, Importance of Biodiversity, Causes of Biodiversity Loss. Study these first, then practise questions on each for Class 11 exams.
How should I revise Biodiversity and Conservation for Class 11 exams?
Learn the core ideas first, then work through the 81 practice questions on Biodiversity and Conservation. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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All CBSE Class 11 Geography Revision Notes

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