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STD 12 - 13. biodiversity and conservation — BIOLOGY STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceBIOLOGYSTD 12 - 13. biodiversity and conservation1 Mark
MCQ
Select the correct statement about biodiversity.
  • A
    The desert areas of Rajasthan and Gujarat have a very high level of desert animal species as well as numerous rare animals.
  • B
    Large scale planting of $Bt$ cotton has no adverse effect on biodiversity.
  • ✓
    Western ghats have a very high degree of species richness and endemism.
  • D
    Conservation of biodiversity is just a fad pursued by the developed countries.
✓

Answer

Correct option: C.
Western ghats have a very high degree of species richness and endemism.
c
(c) : Hotspots are areas with high density of biodiversity or megadiversity which are also the most threatened ones. Ecologically hotspots are determined by four factors -number of species/ species diversity, degree of endemism, degree of threat to habitat due to its degradation and fragmentation, and degree of exploitation. India has three hotspots : Indo­Burma, Himalayas and Western Ghats ­ Sri Lanka. India is even otherwise a country of megadiversity with $2.4\%$ of land area and having $8.1\%$ of global diversity. Major centres of biodiversity are Agasthyamalai hills, Silent valley and Amambalam reserve. There is high degree of endemism as well as richness of species of flowering plants, amphibians, reptiles, some mammals and butterflies.

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