Skip to main content
Super TutorResources
Chapter 29 of 33
QuestionsNotesFlashcardsSummaryFormulasQuizConceptsSyllabusPlan
Syllabus

Loss of Biodiversity

ICSE · Class 11 · Geography

Complete topic list for Loss of Biodiversity in ICSE Class 11 Geography. Key concepts, sub-topics, and what to focus on for board exams.

64 questions28 flashcards5 concepts

Interactive on Super Tutor

Studying Loss of Biodiversity? Get the full interactive chapter.

Quizzes, flashcards, AI doubt-solver and a step-by-step study plan — built for syllabus and more.

Try Super Tutor — Free

1,000+ Class 11 students started this chapter today

4 Topics · ICSE Class 11 Geography

Topics in Loss of Biodiversity

1

1. Meaning and Importance of Biodiversity Loss

  • Biodiversity loss is the shrinkage of species numbers and the degradation of their habitats.
  • Fast population growth and improvement in living conditions have increased pressure on natural resources.
  • Overpopulation and biodiversity loss have caused major damage in tropical regions.
2

2. Types of Species in Loss of Biodiversity

  • From the viewpoint of loss of biodiversity, species are divided into three main classes: threatened, endangered, and extinct.
  • Threatened species are those whose lives are at risk.
  • WCMC's Red Data Books mention 66,000 plant and 2,000 animal species threatened worldwide.
3

3. Geological Extinction Episodes

  • There are six recognised geological extinction episodes in Earth's history.
  • These episodes are Ordovician, Devonian, Permian, Triassic, Cretaceous, and Pleistocene.
  • Ordovician extinction occurred 500 million years ago and eliminated about 50% of animal families, including several trilobites.
4

4. Causes of Extinction of Species

  • Habitat destruction is a major cause of species extinction.
  • Growing human population and modern activities are the main reasons for habitat destruction.
  • In 49 out of 61 old world tropical countries, more than 50% of wildlife habitat has been destroyed.

Key Concepts

Central concept: Loss of Biodiversity

Pressure on natural resourcesTropical zone damageZaire basin and Amazon basinTypes of speciesThreatened speciesEndangered speciesExtinct speciesGeological extinction episodes

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.

More resources for Loss of Biodiversity

All 33 chapters — ICSE Class 11 Geography Syllabus

For serious students

Get the full Loss of Biodiversity chapter — for free.

Quizzes, flashcards, AI doubt-solver and a step-by-step study plan for ICSE Class 11 Geography.

Try Super Tutor Free
Try the full chapter — Free