Biology
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Question

Trilobites were evolved during which of the following periods?

  1. Silurian  
  2. Cambrian  
  3. Ordovician  
  4. Precambrian  

The correct answer is: Cambrian


    The origin of trilobites is considered about 505-510 millions of years ago during Cambrian period. They became extinct in Permian period.

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