These two known extant populations of T. succulenta on Graciosa have recently evolved self‐compatibility. Despite the expectation that selfing would occur at an appreciable rate (self‐incompatible populations of the same species show low but nonzero selfing), high outcrossing was found i...
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Interestingly, individuals from some populations of N. scutatus develop large heads only if fed on larger prey items, whereas individuals from other populations exhibit large heads regardless of feeding regime23. Although the prey items consumed by E. annulatus are too small to favour head ...
In reality of course all these factors likely played a role: structures do not always, or even often, evolve for a single reason. When people who know much more about ceratopsians tell me “The horns ofTriceratopswere for intraspecific display and combat”, I don’t doubt them. But I a...
(e.g., gaining access to data, resource constraints) mean that population-level samples are rarely the case. Rather, researchers usually make use of samples of firms or individuals from specific geographic areas, occupations, industries, organizations, and communities, all of which constitute ...
“Aging can have an evolutionary function if there is a selection for senescence. In our research, we aimed to uncover this selection,” says Eörs Szathmáry. “According to classical explanations, aging emerges in the populations even without selection. That is because individuals would die soon...
1 3 Do students' personality traits change during medical training? A… 1083 We also used Pearson's chi-squared tests to assess the reliable deviation from a stable situation (considered as follows: 2.5% of individuals with a decrease, 95% stable, and 2.5% with an increase). We ...
These are two necessary conditions if common milkweed is to evolve in response to urban environmental change17,50. (Q2) To what extent is urbanization associated with genetic divergence in phenotypic traits among populations? If common milkweed has experienced genetic divergence in response to urbaniz...
Background: Hamilton suggested that cooperation would evolve most readily in viscous (low dispersal) populations, because nearby individuals would have high genetic relatedness. However, Taylor (1992) found that the indirect fitness gains achieved by cooperation with relatives is exactly offset by local...
Thus, relatedness is relative to some outgroup at some portion of the genome, and cooperation between related individuals should generally evolve more easily [16]. Sperm cooperation occurs in a range of taxa 1, 17 and can be directed toward related sperm [18]. This includes the evolution of ...