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Biodiversity and Conservation — Revision Notes

Madhya Pradesh Board · Class 12 · Biology

Biodiversity and Conservation revision notes for Madhya Pradesh Board Class 12 Biology: 4 topics in quick points.

51 questions70 flashcards5 concepts

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Pie charts illustrating the proportionate number of species for major groups of invertebrates, vertebrates, and plants, based on Robert May's global estimates.
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Key Topics to Revise

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1. Meaning and Levels of Biodiversity

  • Biodiversity is the combined diversity at all levels of biological organisation.
  • The three main levels are genetic diversity, species diversity, and ecological diversity.
  • Genetic diversity means variation within a species. A single species may show different forms in different regions.
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2. How Many Species Exist and How They Are Distributed

  • The total number of plant and animal species described so far is slightly more than 1.5 million.
  • Robert May gave a conservative estimate of global species diversity at about 7 million.
  • Extreme estimates of total global species diversity range from 20 to 50 million.
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3. Patterns of Biodiversity

  • Species diversity decreases as we move away from the equator towards the poles.
  • Tropics are defined as the latitudinal range from 23.5° N to 23.5° S.
  • Colombia near the equator has nearly 1,400 bird species.
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4. Species-Area Relationship

  • Species richness increases with area within a region, but only up to a limit.
  • Alexander von Humboldt observed this pattern during explorations in South American jungles.
  • The relationship becomes a rectangular hyperbola on a normal scale.

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Full Notes

Key Concepts

Biodiversity is the total diversity foundGenetic diversity is variation withinSpecies diversity refers to the varietyEcological diversity is the varietyMore than 1

Frequently Asked Questions

What are the important topics in Biodiversity and Conservation for Madhya Pradesh Board Class 12 Biology?
Key topics in Biodiversity and Conservation include Meaning and Levels of Biodiversity, How Many Species Exist and How They Are Distributed, Patterns of Biodiversity, Species-Area Relationship. Study these first, then practise questions on each for the Madhya Pradesh Board Class 12 board exam.
How should I revise Biodiversity and Conservation for the Madhya Pradesh Board Class 12 board exam?
Learn the core ideas first, then work through the 51 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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All Madhya Pradesh Board Class 12 Biology Revision Notes

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