Species evolve through natural selection from "summary" of The Origin of Species (Deluxe Library Binding) (Annotated) by Charles Darwin
The process of natural selection, as I have described in great detail, is the mechanism by which species evolve over time. It is a process of differential survival and reproduction that leads to the gradual change of populations. In nature, individuals within a population exhibit variation in their traits. Some of these variations are heritable, meaning they can be passed down from one generation to the next. The environment in which these individuals live presents challenges and opportunities for survival and reproduction. Individuals with traits that are better suited to their environment are more likely to survive and reproduce, passing on their advantageous traits to their offspring. Over time, these advantageous traits become more common in the population, while less advantageous traits may decrease in frequency or disappear altogether. This process ...
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