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  • Taking an example of white -winged moths and dark-winged moths of England in pre and post industrialised era, explain evolution by natural selection.       <div

Taking an example of white -winged moths and dark-winged moths of England in pre and post industrialised era, explain evolution by natural selection.

 

 

 

 
 
 
 
 

Answers (1)

The number of light winged moths was more during pre-industrialised period in England than dark winged moth were as it reversed in t he post industrialised period. In pre-industrialised period the tree trunks were covered with white thick growth of lichens.

Hence, the light coloured were not spooted by the predator and their number increased, whereas dark coloured moths were captured and their number decreased.

During post industrilization period, the tree trunks became dark due to industrial smoke and hence the dark coloured moths were not captured by the predators and their number increased whereas the light coloured moths were captured and their number decreased.

In mixed population those moths that are better adapted camouflaged to the changed environment survival and increase the population size.

Posted by

Priyanka Kumari

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