Chapter 27 of 33
Revision Notes
Biodiversity for Sustenance of Mankind — Revision Notes
ICSE · Class 11 · Geography
Biodiversity for Sustenance of Mankind revision notes for ICSE Class 11 Geography: 4 topics in quick points. Part of the ICSE Class 11 Geography syllabus.
65 questions36 flashcards5 concepts
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Key Topics to Revise
1
Biodiversity and Human Life
- Human beings have depended on nature for food, clothing, shelter, and survival since early times.
- Natural resources such as air, water, land, and forests are essential for human life.
- Growing population and rising living standards have increased the pressure on natural resources.
2
Food Chain and Ecological Roles
- Plants and algae are at the first level of the food chain and are called primary producers.
- Primary producers use light energy to convert carbon dioxide and water into carbohydrates through photosynthesis.
- Primary consumers are plant-eating animals such as insects, mice, and goat.
3
Biodiversity as a Source of Food
- Only a handful of plants out of about 4,26,752 discovered plant species are used as food crops.
- Major food crops include wheat, rice, maize, pulses, millets, and vegetables.
- These crops provide carbohydrates, proteins, vitamins, and other nutrients.
4
Biodiversity and Medicines
- Plants are used to extract many drugs and medicines.
- Certain animal products are also used in medicine.
- Biological diversity provides raw materials for pharmacists to prepare new drugs.
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Full NotesKey Concepts
Biodiversity includes the variety of plantsA food chain is the systematicPlants and algae are the firstPrimary consumers are plantSecondary consumers feed on primary consumers
Frequently Asked Questions
What are the important topics in Biodiversity for Sustenance of Mankind for ICSE Class 11 Geography?
Key topics in Biodiversity for Sustenance of Mankind include Biodiversity and Human Life, Food Chain and Ecological Roles, Biodiversity as a Source of Food, Biodiversity and Medicines. Study these first, then practise questions on each for Class 11 exams.
How should I revise Biodiversity for Sustenance of Mankind for Class 11 exams?
Learn the core ideas first, then work through the 65 practice questions on Biodiversity for Sustenance of Mankind. 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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