Which of the following can be an alarming consequence of sixth extinction?

  1. Nearly half of all the species on Earth can be wiped out within the next 100 years
  2. Nearly one fourth of all the species on Earth can be wiped out within 200 years
  3. Nearly one eighth of all the species on Earth can be wiped out within 100 years
  4. Nearly one third of all the species on Earth can be wiped out within 200 years
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Which of the following is not a result of loss of biodiversity?

  1. Decline in plant production
  2. Lowered resistance to environmental perturbations such as drought
  3. Increased variability in certain ecosystem processes such as Plant Productivity
  4. Decreased variability in certain ecosystem processes such as pest and disease cycle

Concept Questions :-

Loss of Biodiversity
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Which of the following is not a part of Evil Quartet?

  1. Habitat loss and Fragmentation
  2. Dosage compensation
  3. Alien Species Invasions
  4. Co-extinctions
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The most important cause driving animals and plants to extinction in the Evil Quartet is

  1. Habitat loss and Fragmentation
  2. Over-Exploitation
  3. Alien Species Invasions
  4. Co-extinctions
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Which of the following give the most dramatic examples of habitat loss?

  1. Tropical Rain forest
  2. Temperate Deciduous forest
  3. Temperate Evergreen forest
  4. Grasslands
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Once covering more than ……. of  the Earth's land surface, these rain forests now cover no more than……

  1. 17,10
  2. 14,6
  3. 12,4
  4. 7,3
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Amazon Rain Forests

Which of the following is wrong?

  1. Huge and called lungs of Planet
  2. Harbour millions of species
  3. Amazon forests were being cut and cleared for cultivation of Brassica
  4. Conversion to grasslands and for raising beef cattle among the other reasons for cutting of Amazon forests
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Which of the following is not correct about Fragmentation?

  1. Large habitats are broken up into small fragments due to various human activities
  2. Mammals and birds are affected by fragmentation as they need large territory
  3. Certain animals with migratory habits are badly affected leading to population decline
  4. The main reason for the cause of fragmentation is soya bean cultivation

Concept Questions :-

Loss of Biodiversity
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Which of the following are the extinctions caused by over exploitation for the last 500 years?

  1. Steller's Sea cow
  2. Passenger Pegion
  3. Dodo
  4. Both A and B
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Which of the following is wrong information about consequence of Alien Species Invasions?

  1. Nile Perch - Alien Species
  2. Lake Victoria in East Africa - the ecosystem in which h alien species was introduced
  3. Cichlid fish: Extincted species
  4. Number of extincted species: 176
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