Final answer:
The statement that no one has seen evolution is incorrect. Evolution occurs at different scales and is supported by substantial scientific evidence, including microevolutionary changes like antibiotic resistance in bacteria and macroevolutionary evidence from the fossil record.
Step-by-step explanation:
The assertion that no one has ever seen evolution is not accurate when considering the broad scope of what evolution encompasses. Evolution, in biology, refers to the process through which different kinds of living organisms are thought to have developed from earlier forms during the history of the earth. Evolution is supported by a vast amount of scientific evidence from many different disciplines, including paleontology, genetics, and comparative anatomy.
While it might be true that no one has observed the evolution of a species in the sense of watching a new species form in real time, scientists have indeed observed numerous examples of evolutionary processes. These include observable changes in the gene frequencies of a population over successive generations, which is known as microevolution. For instance, the development of antibiotic resistance in bacteria is a clear and well-documented example of evolutionary change.
Additionally, the fossil record provides compelling evidence of macroevolution, the changes at or above the level of species. Transitional fossils, which show features typical of both an ancestral group and its descendant group, are examples of such evidence. Therefore, when understanding evolution in the appropriate scientific context, it is evident that the process is both observable and well-documented.