Chapter 15 of 15
Revision Notes
Biodiversity and Conservation — Revision Notes
ICSE · Class 12 · Biology
Biodiversity and Conservation revision notes for ICSE Class 12 Biology: 4 topics in quick points. Part of the ICSE Class 12 Biology syllabus.
60 questions44 flashcards5 concepts
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Key Topics to Revise
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1. Meaning, Types, and Definition of Biodiversity
- Biodiversity is the diversity of life around us.
- It is the variability among living organisms and the ecological complexes of which they are part.
- It includes diversity within species, between species, and among ecosystems.
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2. Types of Biodiversity with Examples
- Genetic diversity refers to variation of genes within a species.
- India has more than 50,000 genetically different strains of rice and 1,000 varieties of mango.
- Genetic variation in Rauwolfia vomitoria is seen in the potency and concentration of reserpine.
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3. Global Biodiversity and Patterns
- Estimates of total species on Earth vary from 3 million to 30 million or more.
- According to IUCN (2004), slightly more than 1.5 million species had been described.
- Robert May gave a more conservative estimate of about 7 million species.
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4. Species-Area Relationship and Its Significance
- Alexander Von Humboldt observed that species richness increases with explored area up to a limit.
- On a graph, the species-area relationship forms a rectangular hyperbola.
- On a logarithmic scale, the relationship becomes a straight line.
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Full NotesKey Concepts
Biodiversity is the sum totalBiodiversity is commonly grouped into geneticSpecies diversity generally decreases fromIndia is one of the 12Biodiversity has narrowly utilitarian value through
Frequently Asked Questions
What are the important topics in Biodiversity and Conservation for ICSE Class 12 Biology?
Key topics in Biodiversity and Conservation include Meaning, Types, and Definition of Biodiversity, Types of Biodiversity with Examples, Global Biodiversity and Patterns, Species-Area Relationship and Its Significance. Study these first, then practise questions on each for the ICSE Class 12 board exam.
How should I revise Biodiversity and Conservation for the ICSE Class 12 board exam?
Learn the core ideas first, then work through the 60 practice questions on Biodiversity and Conservation. 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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