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Syllabus

Bio-Diversity — Syllabus

NIOS · Class 10 · Social Studies

What Bio-Diversity covers in NIOS Class 10 Social Studies: 4 topics, for the 2026-27 session. Part of the NIOS Class 10 Social Studies syllabus.

88 questions42 flashcards5 concepts

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An infographic explaining why biodiversity needs to be conserved, highlighting roles in ecosystem stability, food chains, pollination, seed dispersal, and the impact of human activities.
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4 Topics · NIOS Class 10 Social Studies · 2026-27

Topics in Bio-Diversity

1

1. Meaning and Components of Biodiversity

  • Biodiversity is short for biological diversity.
  • It describes the variety of life on Earth and includes physical environment factors such as temperature, soil and water.
  • Biodiversity has three main components: genetic diversity, species diversity and ecosystem diversity.
2

2. Biodiversity in India

  • India lies between 8°4′ North and 37°6′ North latitudes and 68°7′ East and 97°25′ East longitude.
  • India has 2.4% of the world's land area but contributes about 8% of the world's total biodiversity.
  • About 45,000 plant species, comprising about 12% of the world's flora, are found in Indian forests.
3

3. Significance and Loss of Biodiversity

  • Biodiversity is fundamental to life on Earth.
  • Living things in an ecosystem are interdependent and interrelated.
  • Vegetation affects animal life, and changes in vegetation affect humans too.
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4. Natural Vegetation of India

  • Natural vegetation in India depends on climate, physiography and soil.
  • India has tropical evergreen forests, tropical deciduous forests, thorn forests, tidal forests and Himalayan vegetation.
  • Tropical Evergreen Forests occur in areas with more than 200 cm rainfall and a short dry season.

Key Concepts

Central concept: Bio-Diversity

Definition of biodiversityStatus of biodiversity in IndiaSignificance of biodiversityCauses of biodiversity lossNatural vegetation of IndiaTropical Evergreen ForestsTropical Deciduous ForestsThorn Forests

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Frequently Asked Questions

What are the important topics in Bio-Diversity for NIOS Class 10 Social Studies?
Key topics in Bio-Diversity include Meaning and Components of Biodiversity, Biodiversity in India, Significance and Loss of Biodiversity, Natural Vegetation of India. Study these first, then practise questions on each for the NIOS Class 10 board exam.
How should I revise Bio-Diversity for the NIOS Class 10 board exam?
Learn the core ideas first, then work through the 88 practice questions on Bio-Diversity. 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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