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Loss of Biodiversity

ICSE · Class 11 · Geography

Flashcards for Loss of Biodiversity — ICSE Class 11 Geography. Quick Q&A cards covering key concepts, definitions, and formulas.

64 questions28 flashcards5 concepts

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28 Flashcards
Card 1Introduction to biodiversity loss

What is biodiversity loss?

Answer

Biodiversity loss is the decline in the variety of living organisms because species become threatened, endangered, or extinct, and their habitats are damaged or destroyed. It happens when the natural

Card 2Global pattern of biodiversity loss

Why is biodiversity loss considered a major environmental problem in tropical regions?

Answer

Tropical zone areas cover only 1/4th of the globe but house about 3/4th of the world's population. This creates heavy pressure on land, forests, and wildlife. As a result, tropical regions face major

Card 3Tropical rain forests

Why are the Zaire basin and Amazon basin important in the study of biodiversity?

Answer

The maximum damage in tropical rain forests has been done to the Zaire basin in Africa and the Amazon basin in South America. About half of the world's species are found in these forests, so their des

Card 4Species categories

What are threatened species?

Answer

Threatened species are species whose lives are at risk and who always run the danger of losing their lives. WCMC's Red Data Books mention 66,000 plant species and 2,000 animal species as threatened wo

Card 5Species categories

What are endangered species?

Answer

Endangered species are species that face a high risk of extinction in the near future. Mace and Lande (1991) defined endangered species as species with a 20% probability of extinction within 20 years

Card 6Species categories

What are extinct species?

Answer

Extinct species are species for which no member remains alive anywhere in the world. Once a species becomes extinct, it cannot recover because its living population no longer exists.

Card 7Species categories

Differentiate between threatened, endangered, and extinct species.

Answer

Threatened species are at risk of loss. Endangered species are in a more serious condition and may become extinct soon if harmful factors continue. Extinct species have no living member left anywhere

Card 8Population and biodiversity

How does UNEP show that population density affects threatened species?

Answer

UNEP assessed 102 countries and found that densely populated countries had higher proportions of threatened species than thinly populated countries. In 51 densely populated countries, about 5.1% of bi

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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.
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