Gradual changes occur over generations from "summary" of The Origin of Species by Charles Darwin
The process of evolution unfolds slowly over extended periods of time, with modifications accumulating gradually from one generation to the next. These alterations are often subtle and may not be immediately noticeable within a single lifetime, but over many generations, they can lead to significant differences in the characteristics of a species. Through the mechanism of natural selection, advantageous traits are favored and passed on to offspring, while less advantageous traits are gradually eliminated from the population. This gradual process of change allows species to adapt to their environment over time, increasing their chances of survival and reproduction in a changing world. In the grand scheme of evolution, small changes in the genetic makeup of a population can have profound effects on the overall appearance and behavior of a species. These changes are not predetermined o...
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