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  1. Population is defined as a group of individuals of the same species occupying a particular area of the ecosystem at a particular time.
  2. An evolution never takes place from a single organism, but takes place due to populations because there are plenty of chances of genetic recombinations.
  3. Therefore, the population acts as a gene pool.
  4. When individuals having characters inter-breed, they give rise to a new variety in a population.
  5. Thus, evolution is a game of a group of organisms called population and not of a single individual.
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