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Chapter Summary

Biodiversity and Conservation

CBSE · Class 12 · Biology

Summary of Biodiversity and Conservation for CBSE Class 12 Biology. Key concepts, important points, and chapter overview.

51 questions70 flashcards5 concepts

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Pie charts illustrating the proportionate number of species for major groups of invertebrates, vertebrates, and plants, based on Robert May's global estimates.
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Overview

Biodiversity means the combined diversity at all levels of biological organisation, from molecules to biomes. It includes genetic diversity, species diversity, and ecological diversity. Earth supports an enormous variety of life, but this wealth is being reduced by human activities. Conservation is

Key Concepts

Biodiversity is the total diversity found

Biodiversity is the total diversity found at all levels of biological organisation. It includes variation within species, between species, and among e

Genetic diversity is variation within

Genetic diversity is variation within a single species. A classic example is Rauwolfia vomitoria, where different Himalayan populations vary in the po

Species diversity refers to the variety

Species diversity refers to the variety of species in a region. The Western Ghats have greater amphibian species diversity than the Eastern Ghats.

Ecological diversity is the variety

Ecological diversity is the variety of ecosystems in a region. India has deserts, rain forests, mangroves, coral reefs, wetlands, estuaries, and alpin

More than 1

More than 1.5 million plant and animal species have been described. Robert May gave a conservative estimate of about 7 million total species, while ex

Learning Objectives

  • Understand the meaning of biodiversity and its three major levels
  • Recognise patterns in species richness across regions and latitudes
  • Explain the species-area relationship using the logarithmic form
  • Describe how biodiversity supports ecosystem stability and productivity
  • Identify major causes of biodiversity loss, known as the Evil Quartet

Frequently Asked Questions

What are the important topics in Biodiversity and Conservation for CBSE Class 12 Biology?
Biodiversity and Conservation covers several key topics that are frequently asked in CBSE Class 12 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 — CBSE Class 12 Biology?
Understand the core concepts first, then work through the 51 practice questions available for this chapter. Revise formulas and 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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