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
95
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.
【C16】
选项
A、by
B、with
C、as
D、on
答案
A
解析
根据空格前后的内容可判断,公象在交配季节(annual mating)的特点是攻击性增强 (increased aggressive),因此空格处需填入能和characterize搭配,又能满足句子逻辑的介词。be characterized by意为“以……为特征”,故选A项by。
转载请注明原文地址:https://kaotiyun.com/show/S3MD777K
0
考研英语二
相关试题推荐
Thinnerisn’talwaysbetter.Anumberofstudieshave【C1】________thatnormal-weightpeopleareinfactathigherriskofsomedi
Thinnerisn’talwaysbetter.Anumberofstudieshave【C1】________thatnormal-weightpeopleareinfactathigherriskofsomedi
Thinnerisn’talwaysbetter.Anumberofstudieshave【C1】________thatnormal-weightpeopleareinfactathigherriskofsomedi
Howseriouslyshouldparentstakekids’opinionswhensearchingforahome?Inchoosinganewhome,CamilleMcClain’skidsh
Howseriouslyshouldparentstakekids’opinionswhensearchingforahome?Inchoosinganewhome,CamilleMcClain’skidsh
Inanew【C1】________publishedinthejournalHeart,researchersfoundthatSwissadultswhotookoneortwodaytimenapsperwee
Inanew【C1】________publishedinthejournalHeart,researchersfoundthatSwissadultswhotookoneortwodaytimenapsperwee
Britain’sprivateschoolsareoneofitsmostsuccessfulexports.Thechildrenofthewealthy【C1】________tothem,whetherfromC
Britain’sprivateschoolsareoneofitsmostsuccessfulexports.Thechildrenofthewealthy【C1】________tothem,whetherfromC
随机试题
绩效考核即根据目标、岗位及职务标准评估员工的表现,作为奖惩的依据。()
牛黄入丸散剂的常用量是___________g;槟榔驱杀绦虫宜用___________g。
人体最大的长管状骨是
血管壁功能异常所致的出血性疾病是
下列哪一选项体现直接言词原则的要求?()
以下有关集团财务报表审计的说法中不正确的有()。
简述遗忘的规律,并结合遗忘规律谈一下如何有效组织复习。
Itusedtobesostraightforward.Ateamofresearchersworkingtogetherinthelaboratorywouldsubmittheresultsoftheirres
下列关于FTP服务的描述中,错误的是()。
A.Theinventionofthefridge.B.Thepollutioncausedbyfridges.C.Thewidespreadneedforfridges.D.Thedayswithoutt
最新回复
(
0
)