Nature`s Fancy: Charles Darwin and the Breeding of Pigeons
... and abstracted books and articles. His original plan, as is well known, was to publish a large work in several volumes. This would have undoubtedly appeared in the early 1860s if he had not been interrupted by the famous letter from Alfred Russel Wallace that led him to condense the massive tome int ...
... and abstracted books and articles. His original plan, as is well known, was to publish a large work in several volumes. This would have undoubtedly appeared in the early 1860s if he had not been interrupted by the famous letter from Alfred Russel Wallace that led him to condense the massive tome int ...
JANUARY 10-14, 2016 ASILOMAR CONFERENCE CENTER
... made significant contributions to the knowledge of a particular ecosystem or group of organisms, and whose research and writing illuminate principles of evolutionary biology and an enhanced aesthetic appreciation of natural history. Professor Zuk embodies the meaning and intent of this award through ...
... made significant contributions to the knowledge of a particular ecosystem or group of organisms, and whose research and writing illuminate principles of evolutionary biology and an enhanced aesthetic appreciation of natural history. Professor Zuk embodies the meaning and intent of this award through ...
Darwin Conspiracy - Answers in Genesis
... from natural selection has led to the occurrence of more variation among tree offspring than in nature. Matthew noted that protection from selection can lead to the establishment of very different varieties, while Darwin merely noted that release from selection leads to wider variation among individ ...
... from natural selection has led to the occurrence of more variation among tree offspring than in nature. Matthew noted that protection from selection can lead to the establishment of very different varieties, while Darwin merely noted that release from selection leads to wider variation among individ ...
Richardson and Chipman 2003
... example). Indeed, Schwenk (’95) argues that evolutionary constraints affect characters, not clades or organisms. In the context of developmental constraints, morphological characters may not be the best parameter to consider. We suggest that constraints act not on single morphologies, but on transfo ...
... example). Indeed, Schwenk (’95) argues that evolutionary constraints affect characters, not clades or organisms. In the context of developmental constraints, morphological characters may not be the best parameter to consider. We suggest that constraints act not on single morphologies, but on transfo ...
Judgements Made Towards Male Victims of Sexual Assault
... penetration of the vagina; therefore could not be applied to the rape of men. Following increasing recognition that men can be raped, the law was extended to include anal or vaginal penetration of the penis: the Criminal Justice and Public Order Act (1994) stated that ‘it is an offence for a man to ...
... penetration of the vagina; therefore could not be applied to the rape of men. Following increasing recognition that men can be raped, the law was extended to include anal or vaginal penetration of the penis: the Criminal Justice and Public Order Act (1994) stated that ‘it is an offence for a man to ...
An Analysis of Predator Selection to Affect Aposematic Coloration in
... and in different populations opposing expressions of a signal may be of selective advantage. Interactions of natural selection with sexual selection and stochastic processes might furthermore contribute to divergent evolution of phenotypic traits among different populations of a species. For example ...
... and in different populations opposing expressions of a signal may be of selective advantage. Interactions of natural selection with sexual selection and stochastic processes might furthermore contribute to divergent evolution of phenotypic traits among different populations of a species. For example ...
Fluxus_Flirt_Feminist? Carolee Schneemann_Sexual
... While conventional films rely on the notorious cum-shot to signify the climax, and rather ineptly render the feelings involved, Schneemann was concerned with the complexity of the sexual experience, for both, men and women. In Fuses the highpoints of sexual passion are conveyed by a convulsive dens ...
... While conventional films rely on the notorious cum-shot to signify the climax, and rather ineptly render the feelings involved, Schneemann was concerned with the complexity of the sexual experience, for both, men and women. In Fuses the highpoints of sexual passion are conveyed by a convulsive dens ...
Handbook of Sexual Dysfunction
... organic causes of erectile dysfunction (2). These changes in assumed etiology have had profound effects on treatment and conceptualization of the origins of sexual disorders. Many patients who used to be treated by behavioral therapy are now being treated pharmacologically. The rapid development of ...
... organic causes of erectile dysfunction (2). These changes in assumed etiology have had profound effects on treatment and conceptualization of the origins of sexual disorders. Many patients who used to be treated by behavioral therapy are now being treated pharmacologically. The rapid development of ...
Y Fuse? Sex Chromosome Fusions in Fishes and Reptiles
... Sex chromosome evolution offers a unique glimpse into these forces. The X and Y chromosomes of male-heterogametic species (as in mammals) and the Z and W chromosomes of female-heterogametic species (as in birds) differ in many aspects of their evolutionary environments. While Y and W chromosomes are ...
... Sex chromosome evolution offers a unique glimpse into these forces. The X and Y chromosomes of male-heterogametic species (as in mammals) and the Z and W chromosomes of female-heterogametic species (as in birds) differ in many aspects of their evolutionary environments. While Y and W chromosomes are ...
The nature of developmental constraints and the difference
... selection will itself become a factor in determining developmental constraints. If mutation X makes mutation Y more likely, then the probability of Y occurring some number of generations in the future will be greater the more X is favored by natural selection. This mixing of natural selection and de ...
... selection will itself become a factor in determining developmental constraints. If mutation X makes mutation Y more likely, then the probability of Y occurring some number of generations in the future will be greater the more X is favored by natural selection. This mixing of natural selection and de ...
How to read “heritability” in the recipe approach to - Philsci
... Recipes are supposed to apply not only to biological populations of organisms but to any population of entities, as well as any level of organization (Lewontin [1970]). Thus, they represent one way to abstract the Darwinian apparatus. But in recent years, evolutionary theory is undergoing another fo ...
... Recipes are supposed to apply not only to biological populations of organisms but to any population of entities, as well as any level of organization (Lewontin [1970]). Thus, they represent one way to abstract the Darwinian apparatus. But in recent years, evolutionary theory is undergoing another fo ...
Sex chromosomes in willows - Epsilon Open Archive
... and sex chromosome systems in angiosperms allows for studies of processes involved in different stages of their evolution. The ratio between male and female individuals in a dioecious population is expected to be equal due to frequency dependent selection. Distorted sex ratios are however common in ...
... and sex chromosome systems in angiosperms allows for studies of processes involved in different stages of their evolution. The ratio between male and female individuals in a dioecious population is expected to be equal due to frequency dependent selection. Distorted sex ratios are however common in ...
An Introduction to Biological Aging Theory
... medical implications of scientific biological aging theories. See Further Reading for a much more comprehensive treatment of this subject. Scientific theories of biological aging (senescence) attempt to answer two questions: How do we age? What are the specific biological mechanisms that cause aging ...
... medical implications of scientific biological aging theories. See Further Reading for a much more comprehensive treatment of this subject. Scientific theories of biological aging (senescence) attempt to answer two questions: How do we age? What are the specific biological mechanisms that cause aging ...
One - Svet logike
... Darwin understood the phrase, it did not mean a naturalist who is interested in philosophy, but a naturalist who seeks a scientific explanation for the patterns observed in nature. A philosophical naturalist would not be content merely to describe and catalogue the species that populate the Earth, b ...
... Darwin understood the phrase, it did not mean a naturalist who is interested in philosophy, but a naturalist who seeks a scientific explanation for the patterns observed in nature. A philosophical naturalist would not be content merely to describe and catalogue the species that populate the Earth, b ...
evolution - Teacher Pages: Teacher Pages
... mutations in evolution. What question about mutations is beyond the scope of scientific investigation? a. Which mutations lead to traits that increase fitness? b. Which mutations produce desirable changes in populations? c. What effect do mutations have on the amount of variation in the population? ...
... mutations in evolution. What question about mutations is beyond the scope of scientific investigation? a. Which mutations lead to traits that increase fitness? b. Which mutations produce desirable changes in populations? c. What effect do mutations have on the amount of variation in the population? ...
Between Zeus and the Salmon
... This report has been reviewed by a group other than the authors according to procedures approved by a Report Review Committee consisting of members of the National Academy of Sciences, the National Academy of Engineering, and the Institute of Medicine. The National Academy of Sciences is a private, ...
... This report has been reviewed by a group other than the authors according to procedures approved by a Report Review Committee consisting of members of the National Academy of Sciences, the National Academy of Engineering, and the Institute of Medicine. The National Academy of Sciences is a private, ...
Three`s a Crowd or Bonus?: College Students` Threesome
... 1516 Canadians (ages 18-77) and found that 57% of the respondents had fantasized about sex with two men; 85% of men had fantasized about sex with two women. Forty percent of the women had fantasized about sex with two women; 16% of the men with two men. When asked about having fantasized about “enga ...
... 1516 Canadians (ages 18-77) and found that 57% of the respondents had fantasized about sex with two men; 85% of men had fantasized about sex with two women. Forty percent of the women had fantasized about sex with two women; 16% of the men with two men. When asked about having fantasized about “enga ...
Sexual Dysfunctions in Men and Women
... The MPOA is also of importance to the cholinergic influence on sexual behaviour. Injections of the cholinergic agonists oxotremorine and carbachol cause a stimulation of sexual behaviour in male rats seen as a reduced number of intromissions preceding ejaculation, whereas injection of scopolamine re ...
... The MPOA is also of importance to the cholinergic influence on sexual behaviour. Injections of the cholinergic agonists oxotremorine and carbachol cause a stimulation of sexual behaviour in male rats seen as a reduced number of intromissions preceding ejaculation, whereas injection of scopolamine re ...
3 pts - Ionia Public Schools
... What major class of animals did the fossils showing the landmasses linked to form Gondwanaland (the southern portion of Pangaea) belong to, and why were they the dominant organism of the time? (Reptiles – they were evolved to live their whole life on land & it was a tropical area, which favored them ...
... What major class of animals did the fossils showing the landmasses linked to form Gondwanaland (the southern portion of Pangaea) belong to, and why were they the dominant organism of the time? (Reptiles – they were evolved to live their whole life on land & it was a tropical area, which favored them ...
the biology of speciation
... become different species. He concludes, “The complex and little known laws governing the production of varieties are the same, as far as we can judge, with the laws which have governed the production of distinct species” (p. 648). Darwin’s views on the role of ecological divergence in the origin of ...
... become different species. He concludes, “The complex and little known laws governing the production of varieties are the same, as far as we can judge, with the laws which have governed the production of distinct species” (p. 648). Darwin’s views on the role of ecological divergence in the origin of ...
Impression management and college students` use of the term
... [A] sexual encounter, usually lasting only one night, between two people who are strangers or brief acquaintances. Some physical sexual interaction is typical, but it may or may not include sexual intercourse. Such sexual experiences are usually spontaneous (i.e., something that "just happens"); alt ...
... [A] sexual encounter, usually lasting only one night, between two people who are strangers or brief acquaintances. Some physical sexual interaction is typical, but it may or may not include sexual intercourse. Such sexual experiences are usually spontaneous (i.e., something that "just happens"); alt ...
Lesson Overview - mr. welling` s school page
... Lamarck’s Ideas Lamarck also suggested that a bird that acquired a trait, like longer legs, during its lifetime could pass that trait on to its offspring, a principle referred to as inheritance of acquired characteristics. Thus, over a few generations, birds like the black-necked stilt could evolve ...
... Lamarck’s Ideas Lamarck also suggested that a bird that acquired a trait, like longer legs, during its lifetime could pass that trait on to its offspring, a principle referred to as inheritance of acquired characteristics. Thus, over a few generations, birds like the black-necked stilt could evolve ...
Descended from Darwin
... synthesis, Ernst Mayr, described the early twentieth century as rife with opposition to Darwinism. He pointed to the threat Darwinism posed to the argument from design, the lasting influence of essentialism, and the ambiguity of terms and phrases such as selection, species, and survival of the fitte ...
... synthesis, Ernst Mayr, described the early twentieth century as rife with opposition to Darwinism. He pointed to the threat Darwinism posed to the argument from design, the lasting influence of essentialism, and the ambiguity of terms and phrases such as selection, species, and survival of the fitte ...
Sympatric speciation in animals: the ugly duckling grows up
... disruptively selected traits and mate choice does not rest exclusively on the build up of linkage disequilibrium between unlinked genes. This pivotal body of work showed that the models outlined by Maynard Smith10 and Felsenstein8, in which recombination impedes speciation, form only one of several ...
... disruptively selected traits and mate choice does not rest exclusively on the build up of linkage disequilibrium between unlinked genes. This pivotal body of work showed that the models outlined by Maynard Smith10 and Felsenstein8, in which recombination impedes speciation, form only one of several ...
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.