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
28
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.
【C13】
选项
A、endurance
B、ignorance
C、disturbance
D、reliance
答案
D
解析
本句已知的句意为“大象拥有如此众多的嗅觉基因是因为大象在各场合对气味……”,根据第二段第二句they are likely important for the living environment of African elephants“它们(嗅觉基因)对非洲象的生活环境很重要”可知,大象很需要这些嗅觉基因。故选D项reliance“依赖”。与空格后的介词on搭配.表明大象对气味的依赖。
转载请注明原文地址:https://kaotiyun.com/show/ZBsZ777K
0
考研英语一
相关试题推荐
Picture-takingisatechniquebothforreflectingtheobjectiveworldandforexpressingthesingularself.Photographsdepicto
【F1】Mostpeopleknowthatawkwardfeelingwhenyoushuffleintoanelevatorwithotherpeopleandtrynottomakeeyecontact.【
【F1】Mostpeopleknowthatawkwardfeelingwhenyoushuffleintoanelevatorwithotherpeopleandtrynottomakeeyecontact.【
【F1】Muchofthelanguageusedtodescribemonetarypolicy,suchassteeringtheeconomytoasoftlandingoratouchonthebrak
【F1】Whenadiseaseofepidemicproportionsripsintothepopulace,scientistsimmediatelygettowork,tryingtolocatethesour
Youprobablyhavealongmentallistofmomentsandfactsyouwishyoucouldremember—butactuallyyoucannot.Thegoodnews,【B1
Ifyouaren’talreadyparalyzedwithstressfromreadingthefinancialnews,here’sasurewaytoachievethatgrimstate:read
Ifyouaren’talreadyparalyzedwithstressfromreadingthefinancialnews,here’sasurewaytoachievethatgrimstate:read
Peoplearenolongersonaiveastobelievewhatevervestedinterestssay.Itisonlynecessarytolookatsmokingtolearnmuch
随机试题
A.抑制胃壁细胞H+泵B.阻断H2受体C.中和胃酸D.抗幽门螺杆菌E.阻断M1胆碱受体氢氧化铝治疗消化性溃疡病的机制是
患者,神思恍惚,魂蒙颠倒,心悸易惊,善悲欲哭,食少乏力,舌色淡,脉细无力。方选
【2011—4】题6~10:下图所示为一座110kV/35kv/10kV变电站,110kV和35kV采用敞开式配电装置,10kV采用户内配电装置,变压器三侧均采用架空套管出线。正常运行方式下任一路110kV电源线路带全所负荷,另一路热备用,两台主变压器分列
背景资料某城市南郊雨水泵站工程临近大治河,大治河常水位为+3.00m,雨水泵站和进水管道连接处的管内底标高为-4.00m。雨水泵房地下部分采用沉井法施工,进水管为3m×2m×l0m(宽×高×长)现浇钢筋混凝土箱涵,基坑采用拉森钢板桩围护。设计对雨
各国货币政策的首要目标通常是()。
招标人和投标人双方在招标投标活动中的地位平等,任何一方不得向另一方提出不合理的要求,不得将自己的意志强加给对方,这体现了()。
【2014四川泸州】教师职业道德的调节功能不仅指向教育过程,而且指向教师本身。()
左图为给定的多面体,从任一角度观看,下面哪一项不可能是该多面体的视图?
有如下过程:Subproc()DimchAsStringOpen"file1.txt"ForInputAs#1Open"file1_bak.txt"ForOutputAs#2DoWhi
A、Theevolutionofdanceinthetwentiethcentury.B、Artistsofthelastcentury.C、Naturalmovementindance.D、Apioneerinmo
最新回复
(
0
)