首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
考研
If you have ever wondered how an elephant smells, scientists have the answer. Researchers have discovered that African Elephants
If you have ever wondered how an elephant smells, scientists have the answer. Researchers have discovered that African Elephants
admin
2015-11-27
30
问题
If you have ever wondered how an elephant smells, scientists have the answer. Researchers have discovered that African Elephants have the largest number of genes【C1】______smell of any mammal. Given the size of their trunks, and how important it is【C2】______their survival, it is probably unsurprising that an elephant’s nose is not only the longest in the animal kingdom, but also the most effective.
In【C3】______, humans and other primates have a poor sense of smell. "The functions of these genes are not well known,【C4】______they are likely important for the living environment of African elephants," said author Dr Yoshihito Niimura of the University of Tokyo. "【C5】______, an elephant’s nose is not only long but also superior. " The sense of smell is【C6】______to all mammals, and they use it for【C7】______food, finding mates and locating their offspring.
In a study published in Genome Research, scientists【C8】______the 13 mammal species and found that African Elephants have twice the number of smell genes【C9】______dogs and five times more than humans. They have around 2,000 genes alone that are associated with scent. Humans in comparison have just under 400 and some other primates even【C10】______. The study found that 20,000 genes are【C11】______for the sense of smell in mammals, of which around half are functional, but the collections【C12】______for each species. Horses have around 1,000 smell genes, rabbits around 750 and rats about 1,200.
"The large repertoire of elephant (smell) genes might be attributed to elephants’ heavy【C13】______on scent in various contexts, including social【C14】______and reproduction," added Dr Niimura. African and Asian elephants possess a【C15】______scent organ behind each eye, and male elephants can produce a special substance during annual mating, which is characterized【C16】______increased aggressiveness. And【C17】______studies have revealed that, African elephants can reportedly【C18】______between two Kenyan ethnic groups—the Maasai, whose young men【C19】______manhood by spearing elephants, and the Kamba, who are agricultural people that【C20】______little threat to elephants through smell.
【C2】
选项
A、to
B、in
C、by
D、through
答案
A
解析
空格前的部分how important it is说明象鼻(trunks)很重要,空格后的部分their survival意为“大象的生存”。可以看出,前者是相对于后者而言,下文的具体例子可以佐证,故选A项to“对于……”。
转载请注明原文地址:https://jikaoti.com/ti/k5Z7FFFM
0
考研英语一
相关试题推荐
Islamiclawisaparticularlyinstructiveexampleof"sacredlaw".Islamiclawisaphenomenonsodifferentfromallotherforms
Halfoftheworld’spopulationwillbespeakingorlearningEnglishby2015,researcherssay.Twobillionpeopleareexpectedto
Thechangemetthetechnicalrequirementofthenewageandpreventedthedeclineinefficiencythatsocommonlyspoiledthefor
【F1】Mostpeopleknowthatawkwardfeelingwhenyoushuffleintoanelevatorwithotherpeopleandtrynottomakeeyecontact.【
Muchhasbeenwrittenaboutpovertybutnoneoftheaccountsseemtogetattherootoftheproblem.Itmustbenotedthatthed
【F1】Muchofthelanguageusedtodescribemonetarypolicy,suchassteeringtheeconomytoasoftlandingoratouchonthebrak
Youprobablyhavealongmentallistofmomentsandfactsyouwishyoucouldremember—butactuallyyoucannot.Thegoodnews,【B1
Peoplearenolongersonaiveastobelievewhatevervestedinterestssay.Itisonlynecessarytolookatsmokingtolearnmuch
SalesofexistinghomesrosebythelargestamountinmorethanfiveyearsinSeptember.Butanalystscautionedagainstreading
随机试题
溶血性链球菌感染所形成的脓液为
Internet是由什么发展而来的?
实施建筑工程监理前,建设单位应当将_________书面通知被监理的建筑施工企业。()
()是指为建筑消火栓给水系统、自动喷水灭火系统等水灭火系统提供可靠的消防用水的供水系统。
购入材料时支付的增值税和进口关税均应计入采购成本。()
张红去商场购买自行车,见商场摆放有20辆同一型号的自行车。张红从中挑选了一辆。张红付款时突接电话,被告知有急事,需马上离开。于是,张红与营业员商定:先付款,第二天来取自行车。当夜,安保人员疏忽大意未锁大门致商场发生盗窃案,5辆自行车被盗(其中包括张红挑选并
某涂料生产公司甲为增值税一般纳税人,2020年7月发生如下业务:(1)5日以直接收款方式销售涂料取得不含税销售额350万元;以预收货款方式销售涂料取得不含税销售额200万元,本月已发出销售涂料的80%。(2)12日赠送给某医院20桶涂料
货币发挥支付手段的职能表现在()。
在仪表礼仪中,男导游如果着西装,必须注意的问题有()。
PrisonStudiesA)Manywhotodayhearmesomewhereinperson,orontelevision,orthosewhoreadsomethingI’vesaid,willthink
最新回复
(
0
)