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Question

Change in the population of  light coloured variety of peppered moth to its darker variety happened due to
  1. Mutation 
  2. Regeneration 
  3. Genetic isolation 
  4. Temporal isolation 


Solution

The correct option is A Mutation 
A random gene mutation in an light pepper moth resulted in a dark moth. Due to industrial revelution, when soot covered their habitats which was the tree trunks, these dark moths had a better chance at camouflage and survival. So, they grew well due to less predation in dark environment and the population of the light moth decreased.

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