For example, a single pair of rabbits can produce up to six litters a year. Organisms would pass these differences on to their own offspring if they lived long enough to reproduce.ĭarwin's idea proposed that since each individual was different from any other, certain ones possessed particular traits, or characteristics, that favored individual over another. These differences were inherited from the individual's parents. Natural selection is based on the idea that although the individuals that make up a given species all seem alike, there are in fact many important characteristics that make each slightly different from the other. He used the mechanism of natural selection to explain how this could be possible. Darwin suggested that all living things were connected to one another because they had evolved from a few common ancestors. Darwin (1809–1882), during the 1850s to explain how evolution worked. The theory of natural selection was first offered by English naturalist, Charles R. As a result, these individuals are more likely to survive and pass on their genes. It describes the mechanism of natural selection by explaining how the best-adapted individuals are better suited to their environment. Survival of the fittest is a simple way of describing how evolution (the process by which gradual genetic change occurs over time to a group of living things) works.
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