1. Darwin
... through natural selection. But evolution does not always form new species. In a habitat where seasonal changes bring about harsh times, evolution might act against one particular phenotype, and then later that same phenotype might be favored. Evolution is the change in the genetic pool or genetic make-up of populations over generations, so for a population ... state of change? Secondly, he says, is the question of the origin and transitions of organic beings with peculiar habits and structure. How could a terrestrial animal, for example, have been converted into a marine animal, because ...
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