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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Which of the following is not an example of Alien species for our ecosystems?

  1. Carrot Grass
  2. Indigenous catfishes
  3. Lantana
  4. Eichhornia
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The recent illegal introduction of the African catfish……..for aquaculture puposes is posing a threat to the indigenous catfishes of our Rivers

  1. Clarius gariepinus
  2. Cichlid fishes
  3. Parthenium
  4. Steller's Sea cow
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Which of the following is not an example of Co-extinctions?

  1. Plant-pollinator mutualism
  2. Host-parasite extinction
  3. Plant-animal species in an obligatory relationship
  4. Fragmentation in Amazon Rain Forests and Species of mammals
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