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
2017-02-17
27
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.
【C17】
选项
A、subsequent
B、fabulous
C、previous
D、prospective
答案
C
解析
空格所在句的谓语形式have revealed为现在完成时“显示”,表明主语“研究”已经完成,故选C项previous“先前的”。
转载请注明原文地址:https://jikaoti.com/ti/y3v7FFFM
0
考研英语一
相关试题推荐
Mostyoungpeopleenjoysomeformofphysicalactivity.Itmaybeagameofsome【B1】______—football,hockey,golf,ortennis.It
Mostyoungpeopleenjoysomeformofphysicalactivity.Itmaybeagameofsome【B1】______—football,hockey,golf,ortennis.It
Mostyoungpeopleenjoysomeformofphysicalactivity.Itmaybeagameofsome【B1】______—football,hockey,golf,ortennis.It
Mostyoungpeopleenjoysomeformofphysicalactivity.Itmaybeagameofsome【B1】______—football,hockey,golf,ortennis.It
关于宇宙起源的科学发现——1998年英译汉及详解Theywere,byfar,thelargestandmostdistantobjectsthatscientistshadeverdetected:astripof
关于宇宙起源的科学发现——1998年英译汉及详解Theywere,byfar,thelargestandmostdistantobjectsthatscientistshadeverdetected:astripof
技术与天才哪个对科学发展更重要——1994年英译汉及详解Accordingtothenewschoolofscientists,technologyisanoverlookedforceinexpandingthehori
技术与天才哪个对科学发展更重要——1994年英译汉及详解Accordingtothenewschoolofscientists,technologyisanoverlookedforceinexpandingthehori
人类性格与行为形成的原因及影响——1990年英译汉及详解Peoplehavewonderedforalongtimehowtheirpersonalitiesandbehaviorsareformed.Itisnote
随机试题
下列哪个房间的采光系数标准最低值为最大?(2007,22)
关于施工现场大气污染防治的说法,正确的有()。
下列产品定价方法中,属于竞争导向定价法的有()。
下列各项中,属于融资租赁标准的有()。
甲公司2013年1月1日以3000万元的价格购入乙公司30%的股份,另支付相关费用10万元。用公司取得该项投资后对乙公司具有重大影响。购入时乙公司可辨认净资产的公允价值为11000万元,账面价值为10000万元,公允价值与账面价值的差额是由一项存货造成的,
会计账簿记录发生错误时,应当按照规定的更正方法进行更正。下列不是错账更正方法能是()。
研究阶层的心理特征,属于社会心理学的()层面。
学习活动组织与评价设计包括()。
OneSundaymorning,MillieandAmywenttoSunshinePark.Theylovetochatthere.Asusual,theysat【C1】______abigtree.Sudde
如果要彻底退出路由器或者交换机的配置模式,输入的命令是()。
最新回复
(
0
)