She and her team studied mitochondrial (线粒体的) DNA (mtDNA) from people who live in south Africa, such as the Khoisan people. This type of DNA is only passed down from mother to child. This makes it easier to trace one’s ancestry (祖先), according to Business Insider. By tracing ...
Read the passage and find out what Ryan did to help solve the problemof water shortage in Africa.词汇圈点原文呈现句式圈点①have trouble(in) doingThe Well that Changed the Worldsth.在做某事方面有困难改变世界的井have trouble with sth.1 As a six-year-old Canadian schoolboy, Ryan had trouble ...
Two main theories, the Multi- Regional hypothesis and the Out-of-Africa Theory, have arose to support and explicate the fossil records. Unhistorical evidence, like analyzing DNA, have helped scientists trace heredities all the way back in time. This proved that Homo sapiens have evolved in ...
“I Did What I Thought Was Right”,这是布莱尔在2007年5月10日进行的辞职演说。 点击播放视频↓↓↓ 演讲全文:Full text of Tony Blair's resignation speechTimes Online"Thank you all very much. It's a great privilege t...
Where did the Plymouth Colony come from? Where is the Tuareg tribe from in Africa? What region did the Lakota Sioux live in? Where was Chief Powhatan from? Where are the Indians burried from the War of Independance? Where were the Barbary pirates from?
Peopleanddogshavebeenlivingtogetherforaverylongtime.Whendiddogsandpeoplebecomefriends?Wherediddogscomefrom?Agroupofscientiststriedtoanswerthesequestions.Theyjustdidastudyaboutthehistoryofdogs.Inthestudy,theylookedattheDNAofdogsallovertheworldandfoundthatdogslikehumans,sharedDNAwiththeirrelatives(亲戚).Thescientistspu...
IworkedasavolunteerataChildren'sHospitalinCapeTown,SouthAfrica.Myrolewastohelpmakethekidsfeelhappywhiletheywerestayinginthehospital.Soundsinteresting,right?(2)___.LetmetellyouwhyIdidvolunteering.Themainreasonwastohelpcreateabetterfutureforpeople,nomatterwhoorwheretheyare.Inthisbigworld,somanypeopleneedhelp....
The first Americans who came to the land were Indians．Today there are about 900,000 American Indians．There is one part of the country with an especially large Indian population．That is the southwest．Blacks first came to America from Africa as slaves．President Lincoln freed the slaves in ...
Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a question Our experts can answer your tough homework and study questions. Ask a question Search AnswersLearn more about this topic: Apartheid in South Africa | Definition, Laws & Healing...
Where did the Khoikhoi come from?Question:Where did the Khoikhoi come from?The Khoikhoi People:The Khoikhoi people are an ethnic group in Southern Africa distinct from the more populous Bantu people. The Khoikhoi have traditionally been nomadic herders or hunter-gatherers, especially in the regi...