Biodiversity and Conservation
Bihar Board · Class 12 · Biology
Most important questions from Biodiversity and Conservation for Bihar Board Class 12 Biology board exam 2026. MCQs, short answer, and long answer questions with marks.
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Which of the following are the three main levels of biodiversity?
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Genetic diversity, Species diversity, Ecological diversity
The three main levels of biodiversity are genetic diversity (variation within species), species diversity (variety of species), and ecological diversity (variety of ecosystems).
India accounts for what percentage of global species diversity despite having only 2.4% of world's land area?
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8.1%
India's share of global species diversity is an impressive 8.1%, making it one of the 12 mega diversity countries despite having only 2.4% of world's land area.
Which pattern shows that species diversity decreases as we move away from the equator towards the poles?
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Latitudinal gradient
The latitudinal gradient in diversity shows that species diversity generally decreases as we move away from the equator towards the poles. Tropics harbor more species than temperate or polar regions.
Which of the following hypotheses explain greater biological diversity in tropics?
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Longer evolutionary time, More constant environment, Higher solar energy
Tropics have greater diversity due to: longer evolutionary time (undisturbed for millions of years), more constant and predictable environment, and higher solar energy contributing to greater productivity.
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