Natural selection is the primary mechanism for the evolution of life on Earth, driving changes in populations over generations through the inheritance of favorable traits.
Natural selection is the basic mechanism for the evolution of life on Earth according to Charles Darwin. It is a process where organisms with heritable traits that favor survival and reproduction tend to leave more offspring, leading these traits to increase in frequency within a population over generations.
Resources in nature are limited, causing competition for survival and reproduction. Offspring with inherited characteristics that allow them to best compete for these limited resources will survive and reproduce, passing on these favorable traits to the next generation, leading to evolutionary changes over time.
Mutation, genetic drift, gene flow, and natural selection are together called the "forces of evolution," accounting for the genotypic variation observed in the world today.
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