Mutations

      In animal world , they always evolve by mutation . Sometimes it's good . Sometimes it's bad . For  mutation  I have an idea about that chicken can fly as a bird .We all know chicken  looks like bird , they have wings but they can't fly as a bird .  

      

    Those chicken in farm are  been domesticated long time ago .But those chicken in the wild will fly as a bird because they have to adapt the environment . They have to feed themselves every . So that must be  improve their flying ability . That will make their predators feel (insect) some threat . The population of their predators will be reduce .

      
         I think this is the result of natural selection .