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 ...

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

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 ...

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 ...

In his famous experiments on pea plants, Gregor Mendel rejected this ... the population conforms to the following assumptions: Natural selection is not acting on the locus in question (i.e ...

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 ...

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 ...