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Biodiversity and Conservation

Karnataka Board · Class 11 · Geography

Quick revision notes for Biodiversity and Conservation — Karnataka Board Class 11 Geography. Key concepts, formulas, and definitions for last-minute revision.

77 questions20 flashcards5 concepts

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Key Topics to Revise

1

Introduction to Biodiversity

  • Biodiversity is the result of 2.5-3.5 billion years of evolution
  • Earth supported maximum biodiversity before human emergence
  • Global species estimates vary from 2 million to 100 million (best estimate: 10 million)
2

Levels of Biodiversity

  • Three main levels: Genetic, Species, and Ecosystem diversity
  • Genetic diversity refers to variation of genes within species
  • Human beings belong to homo sapiens but show genetic diversity in height, color, appearance
3

Importance of Biodiversity

  • Three main roles: Ecological, Economic, and Scientific
  • Ecological role: Species capture energy, produce/decompose materials, cycle nutrients, fix atmospheric gases, regulate climate
  • More diverse ecosystems are more stable and productive
4

Threats to Biodiversity

  • Human population growth increases resource consumption
  • Tropical regions: 1/4 of world area but 3/4 of human population
  • Tropical rainforests contain 50% of world species but face deforestation

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Full Notes

Key Concepts

Biodiversity combines 'bio' (life) and 'diversity'The weathering mantle formed by geomorphicBiodiversity serves three main rolesMajor threats include human population growthThe International Union of Conservation

Frequently Asked Questions

What are the important topics in Biodiversity and Conservation for Karnataka Board Class 11 Geography?
Biodiversity and Conservation covers several key topics that are frequently asked in Karnataka Board Class 11 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Biodiversity and Conservation — Karnataka Board Class 11 Geography?
Start by understanding all key concepts. Practise previous year questions from this chapter. Revise formulas and definitions regularly. Use flashcards for quick revision 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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