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
2023-02-24
100
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 smeD 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.
【C18】
选项
A、utter
B、compare
C、notice
D、distinguish
答案
D
解析
本文介绍的是大象的嗔觉,由上文可知其嗅觉非常灵敏,句末的through smell表明大象可以依靠气味辨别具有威胁性的部族。故选D项distinguish“区分,辨别”,表明大象可以通过气味分辨出两个不同的肯尼亚部族。A项utter“说”。指人的发音、说话。B项compare“比较”,强调对比的动作而不强调结果。C项notice“注意到”,常指看到什么东西,而不是对两个事物进行对比。
转载请注明原文地址:https://kaotiyun.com/show/03MD777K
0
考研英语二
相关试题推荐
Scientistssentpatternsofelectricitycoursingacrosspeople’sbrains,coaxingtheirbrainstoseelettersthatweren’tthere.
Scientistssentpatternsofelectricitycoursingacrosspeople’sbrains,coaxingtheirbrainstoseelettersthatweren’tthere.
Anyonewho’severbeenwithababycantellyou:ifthey’reupsetaboutsomething,theywillletyouknow.Scientistshavebeen
Thinnerisn’talwaysbetter.Anumberofstudieshave【C1】________thatnormal-weightpeopleareinfactathigherriskofsomedi
Thinnerisn’talwaysbetter.Anumberofstudieshave【C1】________thatnormal-weightpeopleareinfactathigherriskofsomedi
Thinnerisn’talwaysbetter.Anumberofstudieshave【C1】________thatnormal-weightpeopleareinfactathigherriskofsomedi
Inanew【C1】________publishedinthejournalHeart,researchersfoundthatSwissadultswhotookoneortwodaytimenapsperwee
Inanew【C1】________publishedinthejournalHeart,researchersfoundthatSwissadultswhotookoneortwodaytimenapsperwee
Britain’sprivateschoolsareoneofitsmostsuccessfulexports.Thechildrenofthewealthy【C1】________tothem,whetherfromC
Britain’sprivateschoolsareoneofitsmostsuccessfulexports.Thechildrenofthewealthy【C1】________tothem,whetherfromC
随机试题
女性,40岁。4年前呼吸道感染后出现咳嗽伴胸闷,此后反复发作,伴有喘息,多于呼吸道感染后出现,3天前再次发作。体检:呼吸30次/分,口唇微绀,两肺叩诊过清音,闻及哮鸣音,心率110次/分,律齐。为判断病情严重度,急需哪项检查
MRI诊断直肠癌的依据,不包括
在脑中心疝的治疗中,哪一期为抢救治疗的关键时期
资产负债表中“存货”项目的金额,应根据( )账户的余额分析填列。
中央银行为实现特定经济目标而采用的控制和调节货币、信用及利率等方针和措施的总称是()。
下列选项中,关于税负转嫁说法正确的是()。
无法有效防御DDoS攻击的措施是(16)。
Internet使用TCP/IP协议实现了全球范围的计算机网络的互连,连接在Internet上的每一台主机都有一个IP地址。下面哪一个不能作为IP地址?
C
Whatwastheman’sexcuseforhavingbeenlatethistime?
最新回复
(
0
)