Over the past 100 years, the debate about whether Darwin's evolution is correct has never stopped. The emerging scientific facts, while making up for the "missing link" that Darwin had not discovered in the past, are also testing the predictive ability of Darwin's evolution. The "Tiktarik" fossil found in Canada reveals the transition from fish (fins) to terrestrial animals (legs) and is considered to be an excellent example of the "germline gradualism". Of course, Darwin Evolution is not perfect, and it does have a "falsifiable" place. Taking natural selection theory as an example, it was strongly challenged when Mendelian genetics was established, but various new ones that cannot be explained simply by natural selection theory The evidence ultimately expanded people's understanding of evolutionary dynamics and mechanisms, rather than abandoning the theory. This text takes the example of natural selection theory being challenged by Mendelian genetics, with the purpose of:. ["Demonstrating the falsifiability of Darwin's theory of evolution.", "Demonstrating the predictive power of Darwin's theory of evolution.", 'Evidence of the fact that "the theory of germline evolution".', "Deepening people's understanding of biological evolutionary mechanisms."]