How do homologous structures support evolution?
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How do homologous structures support evolution?
Homologous structures support evolution by demonstrating that different species share a common ancestor. These structures, which may serve different functions in various organisms, have similar underlying anatomy, indicating that they evolved from a similar source, despite adaptations to differing environments. This comparative approach illustrates the process of evolutionary divergence as species adapt over time. For instance, the forelimbs of mammals, birds, and reptiles exhibit similar bone structures, affirming their descent from a shared ancestor while adapting to their specific functions like flying, swimming, or grasping.