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module 3 - Berghahn Books
module 3 - Berghahn Books

... wrong). But this is certainly not the case with Darwin who emerges as a towering figure, comparable only to Copernicus, Galileo and Newton. Darwin as a scapegoat So, I have come to praise Darwin, not to bury him. He was indeed a child of his time: nobody can deny that. Shakespeare warned us that ‘Th ...
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Reduced learning ability as a consequence of - Serval

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Unit 3 Revision – critical opinions Rapture and

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The impact of sex education on the sexual

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The Nature and Units of Social Selection
The Nature and Units of Social Selection

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Lewontin on definition of fitness

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Lesson Overview

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The effect of learning on the evolution of new courtship behavior: A

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The Evolution of Intergenerational Discounting in Offspring Quality

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Review Mitonuclear Ecology - Oxford Academic

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On the Evolution of Premating Isolation after a Founder Event

... 1984). In the Hawaiian archipelago, most species of Drosophila are endemic to a single island (Carson 1982). The evidence from geology, chromosomal inversion patterns, and prevailing winds suggests that the majority of speciation events occurred after colonization of a new island that had recently b ...
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Chapter 13

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Book Reviews 103 Wertheimer`s analysis clearly

... the mechanisms that have evolved for these functions can be triggered by other stimuli. Similarly, the rods and cones of the retina have been selected for their responsiveness to light, yet they can be stimulated by pressure from a finger on a closed eyelid, a response for which they were not select ...
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The genetic architecture of insect courtship behavior and

... enough to warrant a re-evaluation of this key question. In this review, I assess available data on the number and effect size of loci underlying behavioral courtship traits, mainly for traits involving auditory phenotypes in Drosophila and other insects. I also assess whether the same or different l ...
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The geographic mosaic in predispersal interactions and selection on

... function because GLS is preferred to maximum likelihood when multivariate normality is not met (see SAS/ STAT User’s guide, SAS Institute, 1990). In any case, we stress that the adequacy of the hypothesis of our causal model is not, in fact, a major issue in this paper. Instead, our interest is to b ...
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Sexual selection



Sexual selection is a mode of natural selection where typically members of one gender choose mates of the other gender to mate with, called intersexual selection, and where females normally do the choosing, and competition between members of the same gender to sexually reproduce with members of the opposite sex, called intrasexual selection. These two forms of selection mean that some individuals have better reproductive success than others within a population either from being sexier or preferring sexier partners to produce offspring. For instance in the breeding season sexual selection in frogs occurs with the males first gathering at the water's edge and croaking. The females then arrive and choose the males with the deepest croaks and best territories. Generalizing, males benefit from frequent mating and monopolizing access to a group of fertile females. Females have a limited number of offspring they can have and they maximize the return on the energy they invest in reproduction.First articulated by Charles Darwin who described it as driving speciation and that many organisms had evolved features whose function was deleterious to their individual survival, and then developed by Ronald Fisher in the early 20th century. Sexual selection can lead typically males to extreme efforts to demonstrate their fitness to be chosen by females, producing secondary sexual characteristics, such as ornate bird tails like the peacock plumage, or the antlers of deer, or the manes of lions, caused by a positive feedback mechanism known as a Fisherian runaway, where the passing on of the desire for a trait in one sex is as important as having the trait in the other sex in producing the runaway effect. Although the sexy son hypothesis indicates that females would prefer male sons, Fisher's principle explains why the sex ratio is 1:1 almost without exception. Sexual selection is also found in plants and fungi.The maintenance of sexual reproduction in a highly competitive world has long been one of the major mysteries of biology given that asexual reproduction can reproduce much more quickly as 50% of offspring are not males, unable to produce offspring themselves. However, research published in 2015 indicates that sexual selection can explain the persistence of sexual reproduction.
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