What can be defined as the process by which modern organisms have descended from ancient organisms?

The process by which modern organisms have descended from ancient organisms is defined as evolution. This concept encompasses the gradual changes in species over time, driven by mechanisms such as natural selection, genetic drift, and mutation. Evolution explains how diverse forms of life have developed from common ancestors, illustrating the relationships among different species.

Understanding evolution is fundamental in biology and helps explain the complexity of life, the adaptation of organisms to their environments, and the formation of new species over extensive periods. It provides insights into the processes that shape the genetic and phenotypic variations seen in current species, demonstrating how they respond to environmental challenges and opportunities throughout their history.