56. Earthworm is called farmer's friend because

1. 1. It fix atmospheric nitrogen

   
   
   

   2. It make the soil porous

   
   
   

   3. It work as insecticide

   
   
   

   4. It act as fungicide

   
   
   

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1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: B

   N/A

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57. Give the correct matching of causative agent and disease

1. 1. Anopheles - Malaria

   
   
   

   2. Lashmania- Sleeping sickness

   
   
   

   3. Glossina - Kala- azar

   
   
   

   4. Wuchereia - Filariasis

   
   
   

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1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: D

   N/A

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58. Fishes die out of water because

1. 1. They get more oxygen

   
   
   

   2. Temparature of body increased

   
   
   

   3. They can not respire

   
   
   

   4. They can not walk in water

   
   
   

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1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: C

   N/A

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59. Archaeopteryz is a connecting link between

1. 1. Reptile and mammal

   
   
   

   2. Birds and mammal

   
   
   

   3. Reptile and Bird

   
   
   

   4. Amphibian and reptile

   
   
   

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1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: C

   N/A

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60. Archaeopteryx is

1. 1. Ancient bird of Jurrasic period

   
   
   

   2. Reptile of Jurrasic period

   
   
   

   3. Reptile of Triasic period

   
   
   

   4. Reptile Jurrasic and triasic period both

   
   
   

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1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: A

   N/A

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