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
外语
A、How they behave toward ants from other nests. B、What they usually eat. C、Why they are becoming extinct. D、Why they were brough
A、How they behave toward ants from other nests. B、What they usually eat. C、Why they are becoming extinct. D、Why they were brough
admin
2018-11-19
53
问题
Today, we are going to continue our discussion of social insects, focusing on the Argentineant, which as you might guess is a species of ant that are natives to Argentina. We’ll consider what happened to this type of ant after some members of the species move to California from their original habitat. Ok, well, in Argentina, these Argentine ants behave like most ant species around the world. They fight other ants of the same species if those ants are from some other nests. But the Argentine ants living in California behave differently. Ants from different nests form a single large colony. Within this colony, there is little aggression among ants from different nests. And when they fight insects from outside their colony, the Argentine ants can quickly recruit a huge army from their network of nests. This of course gives them advantages over other ants’ species. So then, why do Argentine ants behave differently in California than they do in Argentina? Well, using genetic testing, researchers found that all the Argentine ants in California were very similar genetically. You see, when the first Argentine ants came to California, their population must have been very small, and all the later generations of Argentine ants there must be descended from the same few ancestors. So they are all closely related. This discovery is important, because for most social insects, membership in a colony is based on how closely related they are genetically.
Now listen to the following recording and answer questions 22 to 25.
22. What aspect of Argentine ant is mainly discussed?
23. What does the professor say about Argentine ants that live in Argentina?
24. What’s the characteristic of Argentine ants in California?
25. What did genetic testing indicate about the Argentine ants in California?
选项
A、How they behave toward ants from other nests.
B、What they usually eat.
C、Why they are becoming extinct.
D、Why they were brought to California
答案
A
解析
主旨题。根据We’ll consider what happened to this type of ant after some members of the species move to California from their original habitat.Ok,well,in Argentina,these Argentine ants behave like most ant species around the world.和讲座全部内容可知,主要讨论了阿根廷蚂蚁对来自其他蚁巢的蚂蚁是如何表现的。因此,正确答案为A。
转载请注明原文地址:https://kaotiyun.com/show/GgH7777K
0
大学英语六级
相关试题推荐
Usingacomputerorsmartphoneatnightcancauseustopileonthepounds,newresearchhasrevealed.Thestudyfoundalinkbe
A、Embarrassed.B、Excited.C、Joyous.D、Dejected.A细节题。男孩的第一句话就说Doyouknowwhathappenedtometoday?Iwassoembarrassed.表明男孩要讲述
A、Itreceivesmorenutrientsthanitcanabsorb.B、Itbecomesoversaturatedwithwater.C、Itlosestheabilitytosupportinsect
A、Afive-dayweek.B、1,899hours.C、2,100hours.D、1,992hours.C细节题。根据原文,Thecountryshouldcutdownfromits2,100hoursavera
A、Hisgraduateschooltrainingandhisinternship.B、Hisqualificationsandhisexperience.C、Hisdiligenceandhisresponsibili
A、Hewaskidnappedeightmonthsago.B、HefailedinhisnegotiationswiththeAfricans.C、HewasassassinatedinCentralAfrica.
StatesExperimentwithOut-of-ClassroomLearning[A]AttheendofAugust,mostofOhio’steenagerswillshakeofftheirsummert
A、Itimproveshearing.B、Itcausesinfections.C、Itkeepsourearsdry.D、Itprotectsourears.D录音提到耳垢有很多用途,包括保护和清洁耳朵,阻挡灰尘、昆虫等物
SomeSuggestionsforPessimists[A]Obesityandsmokingmaybethemostconspicuouscausesofillnessinthiscountry,butphysi
随机试题
古希腊“百科全书式”的哲学家是()
A公司某项库存商品20lO年12月31日账面余额为l00万元,已计提存货跌价准备20万元。2011年1月20日,A公司将上述商品对外出售,售价为90万元,增值税销项税额为15.3万元,收到款项存入银行。要求:编制出售商品时的会计分录。
女,13岁,发热伴右大腿疼痛2周,查体:精神委靡,患肢呈半屈曲位,皮温高,右大腿远端有压痛。WBC:14×109/L,中性粒细胞占90%,股骨正侧位X线片可见干骺端骨质疏松及层状骨膜反应。为明确诊断,最有意义的检查是
人体存在细菌最多的部位是
药物的吸收、分布、排泄过程要求药物既具有脂溶性又有水溶性。根据药物溶解性和肠壁渗透性的不同可将药物分为不同类别:A.高水溶解性、高渗透性的两亲性分子药物B.低水溶解性、高渗透性的亲脂性分子药物C.高水溶解性、低渗透性的水溶性分子药物D.低水溶解性、
胃阴枯竭、胃气大伤的舌苔为
标准化心理测验具有的优点有()。
不当得利是指没有合法根据,且非基于本人原因导致他人遭受损失而自己获得利益的法律事实。其中,利益取得人叫受益人,负有返回取得利益的义务,遭受损失的人叫受害人,享有请求受益人返回不当利益的权利。根据上述定义,下列属于不当得利的是:
twitter
有如下定义:intb[10]={1,2,3,4,5,6,7,8,9,10},*q=b;则数值为8的表达式是()。
最新回复
(
0
)