In this paper, we conduct research on the college English teaching emphasis from the cultural migration and transformation ofthinking perspectives. College English has long been in for the college English subject stat...In this paper, we conduct research on the college English teaching emphasis from the cultural migration and transformation ofthinking perspectives. College English has long been in for the college English subject status. However, college English as a multidisciplinary,interdisciplinary research in the field of discipline construction, it seems, are still stay in the linguistics, language knowledge in academiccharacteristics for its stage of development. Reform of basic college English teaching, the teacher is still teaching main body, is the teaching oflanguage knowledge, since teachers play an important role in language teaching, the teacher wants to penetrate cultural knowledge in teachingand we must strengthen their own culture. Under this basis, this paper proposes the novel ideals on the related issues that will be meaningful andinnovative.展开更多
When selection increases the frequency of a beneficial gene substitution it can also increase the frequencies of linked neutral alleles through a process called genetic hitchhiking. A model built to investigate reduce...When selection increases the frequency of a beneficial gene substitution it can also increase the frequencies of linked neutral alleles through a process called genetic hitchhiking. A model built to investigate reduced genetic diversity in Pleistocene hominins shows that genetic hitchhiking can have a strong effect on neutral diversity in the presence of culturally mediated mi- gration. Under conditions in which genetic and cultural variants are transmitted symmetrically, neutral genes may also hitchhike to higher frequencies on the coattails of adaptive cultural traits through a process called cultural hitchhiking. Cultural hitchhiking has been proposed to explain why some species of matrilineal whales display relatively low levels of mitochondrial DNA diver- sity, and it may be applicable to humans as well. This paper provides a critical review of recent models of both types of hitch- hiking in socially structured populations. The models＇ assumptions and predictions are compared and discussed in the hope that studies of reduced genetic diversity in humans might improve our understanding of reduced genetic diversity in other species, and vice versa展开更多
文摘In this paper, we conduct research on the college English teaching emphasis from the cultural migration and transformation ofthinking perspectives. College English has long been in for the college English subject status. However, college English as a multidisciplinary,interdisciplinary research in the field of discipline construction, it seems, are still stay in the linguistics, language knowledge in academiccharacteristics for its stage of development. Reform of basic college English teaching, the teacher is still teaching main body, is the teaching oflanguage knowledge, since teachers play an important role in language teaching, the teacher wants to penetrate cultural knowledge in teachingand we must strengthen their own culture. Under this basis, this paper proposes the novel ideals on the related issues that will be meaningful andinnovative.
文摘When selection increases the frequency of a beneficial gene substitution it can also increase the frequencies of linked neutral alleles through a process called genetic hitchhiking. A model built to investigate reduced genetic diversity in Pleistocene hominins shows that genetic hitchhiking can have a strong effect on neutral diversity in the presence of culturally mediated mi- gration. Under conditions in which genetic and cultural variants are transmitted symmetrically, neutral genes may also hitchhike to higher frequencies on the coattails of adaptive cultural traits through a process called cultural hitchhiking. Cultural hitchhiking has been proposed to explain why some species of matrilineal whales display relatively low levels of mitochondrial DNA diver- sity, and it may be applicable to humans as well. This paper provides a critical review of recent models of both types of hitch- hiking in socially structured populations. The models＇ assumptions and predictions are compared and discussed in the hope that studies of reduced genetic diversity in humans might improve our understanding of reduced genetic diversity in other species, and vice versa
