21. Consider the following regions of India
    1. Western Ghat
    2. Aravali Hills
    3. Eastern Himalayas
    Which of the above is / are biodiversity hot spot / hot spots.

1. 1. 1 only

   
   
   

   2. 1 and 3 only

   
   
   

   3. 2 and 3 only

   
   
   

   4. 1, 2 and 3

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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22. Which pair of geographical area shows maximum diversity in our country ?

1. 1. Eastern Himalayas and Western Ghats

   
   
   

   2. Sundervans and Rann of Jutchch

   
   
   

   3. Eastern Ghats & West Bengal

   
   
   

   4. Kerala and Punjab

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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23. Polar bears are carnivores and prey on many arctic birds and fish. However, under natural conditions, no one found polar bears predating any penguin. This is because

1. 1. Penguins have chemical substance in their muscles which is toxic to polar bears

   
   
   

   2. Penguins are gregarious and always move in group, therefore, a polar bear cannot approach them.

   
   
   

   3. Polar bears and penguins never coexist under natural conditions. The former lives in the North pole while the later lives in the south pole

   
   
   

   4. Polar bears and penguins display symbiotic relationships and they help each other for their existence in the ice-cold ecosystem

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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24. BOD is a measure of

1. 1. Industrial wastes passed into water bodies

   
   
   

   2. Amount of carbon monoxide combined with haemoglobin

   
   
   

   3. Extent of pollution with organic matter

   
   
   

   4. Amount of oxygen required by plant during night

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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25. Consider the following statements
    1. National parks are a special category of protected areas of land and sea coasts, where people are an integral part of the system.
    2. Sanctuaries are concerned with conservation of particular species.
    3. Biosphere reserves are connected with the habitate of a particular wild animal.
    Which of the statements given above is/are correct ?

1. 1. 1, 2 and 3

   
   
   

   2. 2 only

   
   
   

   3. 1 and 2 only

   
   
   

   4. 1 and 3 only

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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