have a more pronounced influence on Ne than periods of larger population size. Natural selection can produce genetic variation among demes within a metapopulation if different selective pressures ...

The second point takes on particular significance if we consider the potential for natural selection to influence the frequencies of new mutations. If a population conforms to all other Hardy ...

The first event that the Grants saw affect the food supply was a drought ... The Grants had documented natural selection in action. While beak size is clearly related to feeding strategies ...

The early part of the twentieth century saw evolutionary theory embattled by disagreements over Darwin's emphasis on natural selection ... the new mechanisms of population genetics being studied ...

Darwin's theory of natural selection relies on a couple of basic principles: Natural Variation: Organisms within a population have a set of features. Heritability: They are inherited by the offspring.