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
2018-02-13
21
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/aQT7777K
0
大学英语六级
相关试题推荐
ThemayorofCountyClubHillshelpedarresttwomenWednesdaynightsuspectedintherandomshootinga15-year-oldboyashewa
ThemayorofCountyClubHillshelpedarresttwomenWednesdaynightsuspectedintherandomshootinga15-year-oldboyashewa
A、There’smuchtodobesidesworkandstudy.B、It’sconvenientforpeopletogoanywhere.C、Thenaturalenvironmentisbeneficia
A、Ittaughtstudentshowtousescannersandothermultimediadevices.B、Ithadstudentsbuildadatabaseofpicturesoftheirg
OnJobHoppingDirections:Forthispart,youareallowed30minutestowriteashortessayentitledOnJobHoppingbycommentin
A、Whetherthesecuritycheckswerereallynecessary.B、Howtocopewiththehugecrowdsofvisitorstothemunicipalbuilding.C
WhyDepressionNeedsaNewDefinition[A]Manypsychiatristsbelievethatanewapproachtodiagnosingandtreatingdepression—li
A、Itisusuallydoneonlybyadoctor.B、Itusuallymakestheservicesofadoctorunnecessary.C、Itisusuallydonebythevict
A、She’sspokentohimonthephone.B、Shestayedinhisapartmentforonesummer.C、Shewentonasummertripwithhim.D、Sheus
A、Angermakespeopleagemorequickly.B、Angerisakindofmentaldisorder.C、Angeriscausedbyphysicaldisease.D、Angerdoh
随机试题
局部兴奋的特征不包括()
下列哪项不符合持续性枕后位的临床表现
下列对酶的叙述正确的是
季某,男,13个月。12月26日就诊。患儿于诊前2小时出现发热(体温39.7℃)恶风,鼻塞流浊涕。10分钟前抽搐1次,持续30秒左右,就诊时抽搐已止,精神萎靡。舌质红苔薄白。治疗宜
擅长大补元气而为救脱要药,又善补脾肺之气而生津、安神、健脑益智性平味甘,不燥不腻,补气力缓,多用于脾肺气虚之轻症。又兼生津养血,可治津亏血虚之证
交流电动机空载试运行在无要求时如何测试?记录哪些数据?
在地形艰险及爆破量较小地段(如打水沟、开挖便道、基坑等),下列爆破方式中应优先选择的是()。
投保人和保险人订立保险合同,应当遵循______、______、______的原则,不得损害社会公共利益。( )
Mostyoungpeopleenjoyphysicalactivities,walking,cycling,football,ormountaineering.Thesewhohaveapassion【C1】___
A、Parentsneverasktheirchildrenforadvice.B、Parentsalwaysgivetheirchildrenconstructiveadvice.C、Mostteenagersseldom
最新回复
(
0
)