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
78
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.
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
Inanew【C1】________publishedinthejournalHeart,researchersfoundthatSwissadultswhotookoneortwodaytimenapsperwee
Britain’sprivateschoolsareoneofitsmostsuccessfulexports.Thechildrenofthewealthy【C1】________tothem,whetherfromC
Britain’sprivateschoolsareoneofitsmostsuccessfulexports.Thechildrenofthewealthy【C1】________tothem,whetherfromC
Britain’sprivateschoolsareoneofitsmostsuccessfulexports.Thechildrenofthewealthy【C1】________tothem,whetherfromC
随机试题
肿瘤对烷化剂类药物产生耐药性的机制不包括
毛细血管前阻力血管是指
不属于弥漫性结缔组织病的是()
以只读方式打开Word文件,做了某些修改要保存时,应使用“文件”菜单下的()菜单项。
Excel通过()功能实现图表的创建。
进出境的动植物、动植物产品其他检疫物,装载动植物、动植物产品和其他检疫物的装载容器、包装物,以及来自动植物疫区的运输工具,依照《进出境动植物检疫法》规定实施检疫。()
在社会工作督导的四个类型中,()类型的焦点集中于特殊议题。
下列说法正确的是()。
若有函数模板mySwap和一些变量定义如下:temp1ate<c1assT>voidmySwap(Tx,Ty);doubledl,d2;intil,i2;下列对mySwap的调用中,错误的是()。
下面关于列表框和组合框的叙述正确的是______。
最新回复
(
0
)