Natural selection is the process by which some organisms in a population survive and reproduce, while others do not, based on their bodies and behaviour. It is one of the processes by which ...

In what has been called "the greatest idea anyone ever had," Darwin theorized how those modifications occurred—through a process he called natural selection, which holds that individuals within ...

Evolutionary biology is the study of this process, which can occur through mechanisms including natural selection, sexual selection and genetic drift. A body fossil of a thorny-headed worm ...

Natural selection is a mechanism of evolution. Organisms that are more adapted to their environment are more likely to survive and pass on the genes that aided their success. This process causes ...