How do similarities between molecules support the theory of evolution?

Similarities between molecules, such as DNA, RNA, and proteins, indicate a common ancestry among different species, supporting the theory of evolution. For example, homologous genes or proteins that perform similar functions across diverse organisms suggest that they evolved from a shared ancestor. Additionally, the degree of molecular similarity can help trace evolutionary relationships and infer the timeline of divergence among species. Overall, molecular evidence reinforces the idea that all life forms are interconnected through evolutionary processes.