The Role of Natural Selection and Evolutionary Rates in the Origin of Higher Levels of Organization

1965 ◽  
Vol 14 (4) ◽  
pp. 301-317
Author(s):  
M. K. Hecht
Keyword(s):  
Natural Selection ◽  
Evolutionary Rates ◽  
Levels Of Organization

scholarly journals The evolution of sexual dichromatism in a large radiation of landfowls: re-examining the female-biased selection in Wallace's model

2022 ◽  
Author(s):  
Zheng Li ◽  
De Chen ◽  
Lu Dong
Keyword(s):  
Natural Selection ◽  
Evolutionary Rates ◽  
Sexual Dichromatism ◽  
Colour Difference ◽  
Evolutionary Forces ◽  
Worldwide Distribution ◽  
Terrestrial Habitats ◽  
Males And Females ◽  
The Relationship

Sexual dichromatism, the colour difference between males and females, has been particularly important for studying the interplay between sexual and natural selection. However, previous studies on the evolutionary forces of sexual dichromatism examing the Darwin's and Wallace's model have produced mixed results. Phasianidae is a species-rich family with worldwide distribution, occupancy in nearly all terrestrial habitats, and a wide diversity of plumage patterns and colourations. Here, we use phylogenetic comparative methods to test the relationship between sexual dichromatism and colour complexity of males and females on both evolutionary direction and tempo including all species in Phasianidae. We show that the evolutionary direction of sexual dichromatism is negatively correlated with colour complexity in females but not males, and the evolutionary rates of sexual dichromatism are positively correlated with the evolutionary rates of colour complexity in both sexes. These results highlight the important role of female colour evolution in shaping sexual dichromatism in the pheasant family, and provide strong empirical supports for Wallace's hypothesis via a mosaic of sexual and natural selection in both sexes.

Randomness and Complexity

2018 ◽  
Author(s):  
Steven E. Vigdor
Keyword(s):  
Quantum Mechanics ◽  
Natural Selection ◽  
Rna World ◽  
Biological Evolution ◽  
Variable Theory ◽  
Cosmological Natural Selection ◽  
Einstein Podolsky Rosen ◽  
World Hypothesis ◽  
Rna World Hypothesis

Chapter 7 describes the fundamental role of randomness in quantum mechanics, in generating the first biomolecules, and in biological evolution. Experiments testing the Einstein–Podolsky–Rosen paradox have demonstrated, via Bell’s inequalities, that no local hidden variable theory can provide a viable alternative to quantum mechanics, with its fundamental randomness built in. Randomness presumably plays an equally important role in the chemical assembly of a wide array of polymer molecules to be sampled for their ability to store genetic information and self-replicate, fueling the sort of abiogenesis assumed in the RNA world hypothesis of life’s beginnings. Evidence for random mutations in biological evolution, microevolution of both bacteria and antibodies and macroevolution of the species, is briefly reviewed. The importance of natural selection in guiding the adaptation of species to changing environments is emphasized. A speculative role of cosmological natural selection for black-hole fecundity in the evolution of universes is discussed.

scholarly journals The role of historical factors and natural selection in the evolution of breeding systems of Oxalis alpina in the Sonoran desert ‘Sky Islands’

2010 ◽  
Vol 23 (10) ◽  
pp. 2163-2175 ◽  
Author(s):  
J. PÉREZ-ALQUICIRA ◽  
F. E. MOLINA-FREANER ◽  
D. PIÑERO ◽  
S. G. WELLER ◽  
E. MARTÍNEZ-MEYER ◽  
...  
Keyword(s):  
Natural Selection ◽  
Sonoran Desert ◽  
Breeding Systems ◽  
Sky Islands ◽  
Historical Factors

Role of mutational bias and natural selection on genome-wide nucleotide bias in prokaryotic organisms

Biosystems ◽  
2005 ◽  
Vol 81 (1) ◽  
pp. 11-18 ◽  
Author(s):  
T. Banerjee ◽  
S.K. Gupta ◽  
T.C. Ghosh
Keyword(s):  
Natural Selection ◽  
Mutational Bias ◽  
Nucleotide Bias ◽  
Genome Wide

Pregnancy as a Factor of Adaptive Human Evolution. The Role of Natural Selection in the Origin of Preeclampsia

2021 ◽  
Vol 57 (1) ◽  
pp. 23-35
Author(s):  
V. N. Serebrova ◽  
E. A. Trifonova ◽  
V. A. Stepanov
Keyword(s):  
Natural Selection ◽  
Human Evolution

scholarly journals Increasing variability of body mass and health correlates in Swiss conscripts, a possible role of relaxed natural selection?

2018 ◽  
Vol 2018 (1) ◽  
pp. 116-126 ◽  
Author(s):  
Kaspar Staub ◽  
Maciej Henneberg ◽  
Francesco M Galassi ◽  
Patrick Eppenberger ◽  
Martin Haeusler ◽  
...  
Keyword(s):  
Natural Selection ◽  
Body Mass

scholarly journals Evolution of gene regulatory networks by means of selection and random genetic drift

2018 ◽  
Author(s):  
Antonios Kioukis ◽  
Pavlos Pavlidis
Keyword(s):  
Natural Selection ◽  
Positive Selection ◽  
Genetic Drift ◽  
Regulatory Networks ◽  
Fitness Landscape ◽  
Random Genetic Drift ◽  
Maturation Period ◽  
Evolutionary Forces ◽  
Gene Regulatory

The evolution of a population by means of genetic drift and natural selection operating on a gene regulatory network (GRN) of an individual has not been scrutinized in depth. Thus, the relative importance of various evolutionary forces and processes on shaping genetic variability in GRNs is understudied. Furthermore, it is not known if existing tools that identify recent and strong positive selection from genomic sequences, in simple models of evolution, can detect recent positive selection when it operates on GRNs. Here, we propose a simulation framework, called EvoNET, that simulates forward-in-time the evolution of GRNs in a population. Since the population size is finite, random genetic drift is explicitly applied. The fitness of a mutation is not constant, but we evaluate the fitness of each individual by measuring its genetic distance from an optimal genotype. Mutations and recombination may take place from generation to generation, modifying the genotypic composition of the population. Each individual goes through a maturation period, where its GRN reaches equilibrium. At the next step, individuals compete to produce the next generation. As time progresses, the beneficial genotypes push the population higher in the fitness landscape. We examine properties of the GRN evolution such as robustness against the deleterious effect of mutations and the role of genetic drift. We confirm classical results from Andreas Wagner’s work that GRNs show robustness against mutations and we provide new results regarding the interplay between random genetic drift and natural selection.

scholarly journals Considering the role of ecology on individual differentiation

2016 ◽  
Vol 39 ◽  
Author(s):  
Tomás Cabeza de Baca ◽  
Rafael Antonio Garcia ◽  
Michael Anthony Woodley of Menie ◽  
Aurelio José Figueredo
Keyword(s):  
Social Roles ◽  
Social Systems ◽  
Character Displacement ◽  
Complex Societies ◽  
Levels Of Organization ◽  
Multiple Levels ◽  
Individual Differentiation ◽  
Strategic Differentiation ◽  
Integration Effort

AbstractOur commentary articulates some of the commonalities between Baumeister et al.'s theory of socially differentiated roles and Strategic Differentiation-Integration Effort. We expand upon the target article's position by arguing that differentiating social roles is contextual and driven by varying ecological pressures, producing character displacement not only among individuals within complex societies, but also across social systems and multiple levels of organization.

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