Beringian Standstill and Spread of Native American Founders
نویسندگان
چکیده
منابع مشابه
Beringian Standstill and Spread of Native American Founders
Native Americans derive from a small number of Asian founders who likely arrived to the Americas via Beringia. However, additional details about the initial colonization of the Americas remain unclear. To investigate the pioneering phase in the Americas we analyzed a total of 623 complete mtDNAs from the Americas and Asia, including 20 new complete mtDNAs from the Americas and seven from Asia. ...
متن کاملSinodonty, Sundadonty, and the Beringian Standstill model: Issues of timing and migrations into the New World
C.G. Turner II made dental morphological observations on thousands of Eskimo-Aleuts and American Indians and concluded they were derived from ancestral populations in northeast Asia during the last stages of the Pleistocene. He further distinguished two dental patterns in Asia. In East Asia, populations exhibit Sinodonty, a specialized dentition with intensified trait expressions. Southeast Asi...
متن کاملpatterns and variations in native and non-native interlanguage pragmatic rating: effects of rater training, intercultural proficiency, and self-assessment
although there are studies on pragmatic assessment, to date, literature has been almost silent about native and non-native english raters’ criteria for the assessment of efl learners’ pragmatic performance. focusing on this topic, this study pursued four purposes. the first one was to find criteria for rating the speech acts of apology and refusal in l2 by native and non-native english teachers...
15 صفحه اولNative and Non-native Teachers’ Pragmatic Criteria for Rating Request Speech Act: The Case of American and Iranian EFL Teachers
Abstract: Over the last few decades, several aspects of pragmatic knowledge and its effects on teaching and learning a second language (L2) have been explored in many studies. However, among various studies, the area of interlanguage pragmatic (ILP) assessment is quite novel issue and many features of it have remained unnoticed. As ILP assessment has received more atten...
متن کاملnative speaker norms and teaching english to non_native speakers : the case of iranian efl learners
امروزه، این که زبان انگلیسی سریع ترین و گسترده ترین زبان مورد استفاده در سراسر جهان است به عنوان یک واقعیت پذیرفته شده است. استفاده مشترک از زبان انگلیسی به عنوان یک زبان بین المللی مستلزم هنجارها و مدل های یادگیری و تدریس زبان است. زبان شناسان توجه ویژه ای به مفهوم "زبان مادری" به عنوان تنها منبع درست و قابل اعتماد از داده های زبان می داده اند.با این حال، این اصطلاح به اندازه کافی روشن به نظر ...
15 صفحه اولذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: PLoS ONE
سال: 2007
ISSN: 1932-6203
DOI: 10.1371/journal.pone.0000829