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Chapter Summary

Loss of Biodiversity

ICSE · Class 11 · Geography

Summary of Loss of Biodiversity for ICSE Class 11 Geography. Key concepts, important points, and chapter overview.

64 questions28 flashcards5 concepts

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Overview

Biodiversity loss means the shrinkage of species, their habitats, and the balance of natural life. Fast population growth, rising resource use, deforestation, pollution, hunting, and the spread of exotic species have all reduced natural diversity. Tropical regions are especially affected because the

Key Concepts

Biodiversity loss is the reduction

Biodiversity loss is the reduction in the variety of living organisms and the habitats that support them. It happens when natural ecosystems are damag

Threatened species are species whose lives

Threatened species are species whose lives are at risk. WCMC Red Data Books mention 66,000 plant species and 2,000 animal species as threatened worldw

Endangered species are species that face

Endangered species are species that face a high risk of extinction in the near future. Mace and Lande (1991) defined endangered species as species wit

A species is extinct when no

A species is extinct when no member of it remains alive anywhere in the world.

Six major extinction episodes are recognised

Six major extinction episodes are recognised in Earth's history: Ordovician, Devonian, Permian, Triassic, Cretaceous, and Pleistocene.

Learning Objectives

  • Understand the meaning of biodiversity loss and its causes
  • Distinguish between threatened, endangered, and extinct species
  • Identify major geological extinction episodes in Earth's history
  • Explain how human activities increase the risk of extinction
  • Recognise the importance of habitat protection, wildlife control, and conservation

Frequently Asked Questions

What are the important topics in Loss of Biodiversity for ICSE Class 11 Geography?
Loss of Biodiversity covers several key topics that are frequently asked in ICSE 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 Loss of Biodiversity — ICSE Class 11 Geography?
Understand the core concepts first, then work through the 64 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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