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Alfred Russel Wallace co-authored with Darwin the first ever publication on natural selection: The tendency of species to form varieties,and on the perpetuation of varieties and species by natural means of selection in 1858, and is credited with co-discovering natural selection.

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Alferd russel wallace alo indepedently concluded that natural celection contributed to orgien of new species . for eg we have seen red beetles which are eaten by cows . so the population of red beetles gradually got eleminated or perished from its environment . but at the same time green beetles are not seen by cows so that in green leaves so the population of green beetles are increasing day by day . this is called 'natural selection'
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celection is wrong it is selection
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