For biologists what does the term evolution imply?

Biology literally means "the study of life". Life Sciences attempts to untie the living things mysteries from the working of protein 'machines', to the growth of organism from a single cell to the majesty and intricacy of whole ecosystem.

Questions about life sciences are as diverse and fascinating as life itself like; how a single cell knows to build up complex organism? How interpretation of genetic information takes place? How the properties of organism are affected due to gene mutation? How ecosystem changes due to climate? What can human genetic variation tell us about the history of human evolution and migration?

Evolution is the change in heritable traits of biological populations over successive generations. Evolutionary processes give rise to diversity at every biological organization level. All life on earth shares a common ancestor known as the last universal ancestor. In the mid-19th century, Charles Darwin formulated the scientific theory of evolution by natural selection, while in the early 20th century the modern evolutionary synthesis integrated classical genetics with Darwin's theory of evolution by natural selection through the discipline of population genetics. Evolution is a cornerstone of modern science, accepted as one of the most reliably established of all facts and theories of science, based on evidence not just from the biological sciences but also from anthropology, psychology, astrophysics, chemistry, geology, physics, mathematics, and other scientific disciplines, as well as behavioral and social sciences.