16. Which ancestor of man for the first time began the bipedal locomotion ?

1. 1. Cromagnon man

   
   
   

   2. Australopithecus

   
   
   

   3. Java-opeman

   
   
   

   4. Peking man

   
   
   

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   NA

   Correct Option: B

   NA

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17. Earth originated in the past period of about

1. 1. 4.5 billion years

   
   
   

   2. 8.0 billion years

   
   
   

   3. 3 billion years

   
   
   

   4. 1 billion years

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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18. Gene pool is

1. 1. Genotype of individuals of a polulation

   
   
   

   2. Different genes of all dividuals of a species

   
   
   

   3. Pool of artificially synthesised genes

   
   
   

   4. Gene of a genome

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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19. Geographic and reproductive isolation bring about

1. 1. Extinction

   
   
   

   2. Over production

   
   
   

   3. Speiciation

   
   
   

   4. Competition

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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20. Wings of pigeon, bat and mosquito exhibit the phenomen on called

1. 1. Convergent evolution

   
   
   

   2. Divergent evolution

   
   
   

   3. Atavism

   
   
   

   4. All of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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