The phrase "survival of the fittest" functions principally in evolutionary theory to describe the biological concept of ...

Plants withered and finches grew hungry ... The Grants had documented natural selection in action. While beak size is clearly related to feeding strategies, it is also related to reproduction.

or to the movement of gametes (e.g., as a consequence of pollen transfer among plants). In the absence of natural selection and genetic drift, gene flow leads to genetic homogeneity among demes ...

No one was sure how animals or plants passed down traits. And Darwin knew that the lack of an explanation for heredity left a big gap in his theory of natural selection. In one of the great ...

Biodiversity close biodiversityThe range of animals and plants in a given area. means having as wide a range of different species in an ecosystem as possible. It is important to conserve the ...

Today, with access to heretofore unprecedented data sets for the study of human genetic variation, researchers can exploit the genetic signatures of natural selection using novel analytical methods.

Charles Darwin close Charles DarwinAn English naturalist (1809-1882). In 1859 Darwin published On the Origin of Species, which outlined his theory of evolution. was an English naturalist who ...