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
2022-01-04
87
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://kaotiyun.com/show/NNY4777K
0
考研英语二
相关试题推荐
StudythefollowingdrawingcarefullyandWriteanessayinwhichyoushould:1)describethedrawing,2)interpretthemeaning
Thesentence"Aftereachrainshower,anotherInternetmillionairesprangup"(Paragraph1)means______.Whatdoesthepassage
Whichofthefollowingcanbethebesttitleofthispassage?Accordingtothepassage,whydoesadrinkbringseriousresults
ThemajordifferencebetweennarrativesalesandsuggestivesalesisthatThebiggestchallengeforaconsultativesalesperson
Accordingtothepassage,thefactthatyoungpeopleseemtobelosinginterestinscience______.Thebesttitleforthepassa
Accordingtothepassage,thefactthatyoungpeopleseemtobelosinginterestinscience______.Thesecondparagraphismain
Overthepastdecade,manycompanieshadperfectedtheartofcreatingautomaticbehaviors-habits-amongconsumers.Thesehabits
TheUnitedStateshashistoricallyhadhigherratesofmarriagethanthoseofotherindustrializedcountries.Thecurrentannual
Thebattletopreventoratleastslowglobalwarminghasintensifiedinthepastyearasscientistshavelearnedmoreaboutthe
随机试题
Aworldheavyweightchampionshipmatchisfront-pagcnews.
生产压差每增加1MPa所增加的日产油量叫()。
能否形成企业凝聚力,取决于企业领导层能否把正确的价值观转为全体员工共识的价值观。()
承租人对其融资租入固定资产而产生的负债作为
阅读下面的文字:宗教家创造出神来供自己崇拜。最高的造出上帝,其次造出英雄之神,再其次造出财神、土地公、土地婆来供自己崇拜。省事者把别人创造的现成之神来崇拜。美术家如罗丹,是一面造石像,一面崇拜自己的创造。教育者不是造神,不是造
A.以前牙区为主,尤其是下前牙区最为显著,也可波及全口牙的牙龈B.前牙区的唇侧牙龈C.可发生于少数牙或全口牙牙龈,以前牙区为重D.单个的牙间乳头瘤状增生物E.全口牙龈,以前牙区较重,只发生于有牙区下列疾病的主要累及病变区是妊娠期龈瘤主要表现为
依照产品质量法规定,产品缺陷造成损害要求赔偿的诉讼时效期间为()。
蓄电池按其电解液的不同可分为( )。
分组计算审查法的最大优点()。
市政公用工程质量预防措施应符合的规定是( )。
最新回复
(
0
)