Evolution as unifying theory in biology from "summary" of On the Origin of Species By Means of Natural Selection by Charles Darwin
The theory of evolution serves as the unifying principle in the field of biology. It provides a framework through which we can understand the diversity of life on Earth. Through the process of natural selection, species gradually change over time, adapting to their environments in order to survive and reproduce. Evolution explains the similarities and differences we observe among living organisms. By tracing the ancestry of different species, we can see how they have evolved from common ancestors. This shared history helps us make sense of the relationships between different organisms and how they have come to occupy different niches in the ecosystem. Furthermore, evolution helps us understand the process of speciation. As populations of organisms become isolated from one another, they can evolve independently, eventually leading to the...
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