31. There is no life on moon because of absence of

1. 1. Water

   
   
   

   2. Oxygen

   
   
   

   3. Nitrogen

   
   
   

   4. Hydrogen

   
   
   

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   NA

   Correct Option: A

   NA

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32. Tusks of elephant are

1. 1. Cannines

   
   
   

   2. Upper incisors

   
   
   

   3. Molar

   
   
   

   4. Lower incisors

   
   
   

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   NA

   Correct Option: D

   NA

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33. Homologous organ are

1. 1. Similar in structure

   
   
   

   2. Similar in function

   
   
   

   3. Similar in both structure and function

   
   
   

   4. Disimillar in structure

   
   
   

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   NA

   Correct Option: A

   NA

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34. The scientist associated with formulation of modern theory of origin of life and having written origin of life was

1. 1. Oparin

   
   
   

   2. Huxley

   
   
   

   3. Lamark

   
   
   

   4. Darwin

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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35. Who published the book 'Origin of species by natural selection in 1859' ?

1. 1. Lamarck

   
   
   

   2. Darwin

   
   
   

   3. Wallace

   
   
   

   4. Oparin

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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