Which of the following data is not according to IUCN Red List (2004)?

  1. Vertebrates-338
  2. Invertebrates-359
  3. Plants-87
  4. Bacteria-104
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The extinctions of 784 species recorded in IUCN Red List (2004) happened over

  1. Last 240 years
  2. Last 500 years
  3. Last 300 years
  4. Last 400 years
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Which of the following is wrongly matched recent extinction?

  1. Dodo-Mauritius
  2. Quagga-Africa
  3. Thylacine-Australia
  4. Steller's Sea Cow- Stanford
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Which of the following is not recently extincted subspecies of tiger?

  1. Bali
  2. Javan
  3. Caspian
  4. Sumata
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The last twenty years or so have witnessed the disappearance of at least

  1. 27 species
  2. 40 species
  3. 12 species
  4. 7 species
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Which of the following is not correct regarding extinction of species?

  1. Some groups like fishes appear to be more vulnerable to extinction
  2. More than 15500 species world-wide are facing the threat of extinction
  3. Presently, 12 per cent of all bird species in the world face the threat of extinction.
  4. Both B and C

Concept Questions :-

Loss of Biodiversity
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Which of the following is not correct regarding vulnerability data of different groups?

  1. Birds-12 per cent
  2. Mammals- 23 per cent
  3. Amphibians- 27 per cent
  4. Gymnosperms- 31 per cent
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Fossil records suggest that

  1. Large scale of loss of species have happened earlier even before humans appeared on Earth
  2. Large scale of loss of species have happened earlier within 1000 years of human evolution
  3. Large scale of loss of species have happened earlier just after humans appeared on Earth
  4. Large scale of loss of species have happened within 100 years of human evolution.

Concept Questions :-

Loss of Biodiversity
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Which of the following mass extinction is going on

  1. 5th
  2. 6th
  3. 4th
  4. 7th
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More than …a…..was the time period during which …b….mass extinction has taken place

  1. a- more than three billion years
  2. a- more than 4.5 billion years
  3. b- six extinctions
  4. Both A and C

Concept Questions :-

Loss of Biodiversity
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