[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fL3UEtZFxKZhoHKagBLuiR6ZsRlzP3KbnP9iQeqkVYFQ":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":16,"related":17,"source":27,"type":28},[],"2023-12-13 13:38:25",113632142,[8,9,10,11],"life arose by natural selection","meteorites brought prokaryotic cells to earth","life arose by physical evolution","life arose spontaneously by chemical evolution",{"courseId":13,"courseImg":14,"courseName":15},"2ebaeb8882ea33e9325b81c35831f73e","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F48eba3395437dd881b1b9275a0ad1028.png","生物专业英语","The main current hypothesis on the origin of life on earth holds that_____",[18,29,38,41,50,59,68,77,86,96],{"answer":19,"createTime":5,"id":20,"options":21,"question":26,"source":27,"type":28},[],113632140,[22,23,24,25],"are RNA molecules","all of the above","act as catalysts","can build RNA molecules","Ribozymes_______","v1",0,{"answer":30,"createTime":5,"id":31,"options":32,"question":37,"source":27,"type":28},[],113632141,[33,34,35,36],"1.5 billion years old","5 billion years old","3.5 billion years old","2.5 billion years old","The oldest fossils yet discovered are______",{"answer":39,"createTime":5,"id":6,"options":40,"question":16,"source":27,"type":28},[],[8,9,10,11],{"answer":42,"createTime":5,"id":43,"options":44,"question":49,"source":27,"type":28},[],113632143,[45,46,47,48],"1.5 million years ago","1.5 billion years ago","4.5 billion years ago","4.5 million years ago","Eukaryotic organisms are believed to have evolved______",{"answer":51,"createTime":5,"id":52,"options":53,"question":58,"source":27,"type":28},[],113632144,[54,55,56,57],"The animals found in the Tommotian fossil bed were once thought to belong to a variety of modern animal groups, but now they are thought to have descended from a single group","It is unclear whether the Tommotian fossils from the early Cambrian period represent unique body forms or whether they should be assigned to various modern animal groups","Though at first they thought otherwise, paleontologists now agree that the animals in the Tommotian have body forms from which modern animals have descended","Animals in the Tommotian fossil beds were initially assigned to modern animal groups but are now thought to belong to groups that emerged and died out during the Cambrian period","At one time, the animals present in these fossil beds were assigned to various modern animal groups, but most paleontologists now agree that all Tommotian fossils represent unique body forms that arose in the early Cambrian period and disappeared before the end of the period, leaving no descendants in modern animal groups. Which of the sentences below best expresses the essential information in the above sentence",{"answer":60,"createTime":5,"id":61,"options":62,"question":67,"source":27,"type":28},[],113632145,[63,64,65,66],"affect","complicate","encourage","prevent","Conditions that promote fossilization of soft-bodied animals include very rapid covering by sediments that create an environment that discourages decomposition. The underlined word"promote"in the sentence is closest in meaning to______",{"answer":69,"createTime":5,"id":70,"options":71,"question":76,"source":27,"type":28},[],113632146,[72,73,74,75],"comparatively","surprisingly","collectively","characteristically","Animals originated relatively late in the history of Earth—in only the last 10 percent of Earth's history. During a geologically brief 100-million-year period, all modern animal groups (along with other animals that are now extinct) evolved. The underlined word"relatively"in the sentence is closest in meaning to______",{"answer":78,"createTime":5,"id":79,"options":80,"question":85,"source":27,"type":28},[],113632147,[81,82,83,84],"分类科学","分类群","分类学","分类单位","The exact Chinese meaning of "taxonomy" is______",{"answer":87,"createTime":88,"id":89,"options":90,"question":95,"source":27,"type":28},[],"2023-12-13 13:38:26",113632148,[91,92,93,94],"steady decline in number","gradual increase in body size","emergence of many varieties","sudden disappearance","The rapid origin and diversification of animals is often referred to as "the Cambrian explosion." The underlined word "diversification" in the sentence is closest in meaning to______",{"answer":97,"createTime":88,"id":98,"options":99,"question":104,"source":27,"type":28},[],113632149,[100,101,102,103],"numerous","unexplained","important","sudden","The geologic timescale is marked by significant geologic and biological events, including the origin of Earth about 4.6 billion years ago, the origin of life about 3.5 billion years ago, the origin of eukaryotic life-forms (living things that have cells with true nuclei) about 1.5 billion years ago, and the origin of animals about 0.6 billion years ago. The underlined word "significant" in the sentence is closest in meaning to______"]