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
For hundreds of years, farmers have selected and bred plants and animals to favor, or bring out, characteristics they desired. F
For hundreds of years, farmers have selected and bred plants and animals to favor, or bring out, characteristics they desired. F
admin
2010-06-18
27
问题
For hundreds of years, farmers have selected and bred plants and animals to favor, or bring out, characteristics they desired. For example, cows that produced large amounts of milk were selected for breeding, while poor milk producers were not allowed to reproduce. In like manner, horses were bred for speed and strength. Those having these desired characteristics were selected for breeding. Over time, these preferred breeds became more common than earlier, less desired types. This selective breeding is called artificial selection.
In this passage, Camp and Arms explain how this same process occurs naturally. The theory of evolution by natural selection was put forward in a joint presentation of the views of Charles Darwin and Alfred Russell Wallace before the Linnaean Society of London in 1858. Darwin and Wallace were not the first to suggest that evolution occurred; but their names are linked with the idea of evolution because they proposed the theory of natural se- lection as the mechanism by which evolution occurs. We are always more likely to believe in a process when people explain how it happens than if they merely assert that it does.
The theory of evolution by means of natural selection is based on three observations. First, as we can see by comparing one cat or human being with another, the members of a species differ from one another; that is, there is variation among individuals of the same species. Second, some (though not all) of the differences between individuals are inherited. (Other differences are not inherited, but are caused by different environments. For in- stance, two plants with identical genes may grow to different sizes if one of them is planted in poor soil. ) Third, more organisms are born than live to grow up and reproduced many organisms die as embryos or seeds, as saplings, nestlings, or larvae.
Inherited characteristics that improve an organism’s chances of living and reproducing will be more common in the next generation and those that decrease its chances of reproducing will be less common. Various genes or combinations of genes will be naturally selected for or against, from one generation to the next, depending on how they affect reproductive potential. For natural selection to cause a change in a population from one generation to the next (that is, to cause evolution), it is not necessary that all genes affect survival and reproduction; the same result occurs if just some genes make an individual more likely to grow up and reproduce.
Which statement is FALSE?
选项
A、Members of a species differ from one another.
B、differences between individuals are inherited.
C、Two organisms with identical genes may grow to different sizes.
D、More organisms are born than live to reproduce.
答案
B
解析
根据第四段中“Second,some(though not all)of the differences between individuals are inherited”,就可断定[B]内容是错误的,故而是正确答案。
转载请注明原文地址:https://kaotiyun.com/show/7TlO777K
0
专业英语八级
相关试题推荐
OnceshamewasaveryBritishemotion.Itgovernedpeople’sliveslongafterstocksandduckingstoolswereabolished.Shakespea
ThepoorestpeopleinLeicesterbyawidemarginaretheSomaliswholiveintheStMatthewshousingestate.Refugeesfromcivil
Thewaythingsarelooking,theroyalfamilywillneedtostartbulkbuyingbirthdaycards.WhenKingGeorgeVsentthefirstte
ForyearswehavebeentalkingaboutaddictiontotheInternet,andthentothemobilephone.ArecentsurveyinUKfoundthat_
Oneofthemostunexpectedthingsabouthavingchildrenishowthequesttomoldperfectlittlehumansultimatelybecomesaproj
There’sanewcampaignfortheunder-30scalledUndivided.ItgatherssuggestionsaboutBrexitfromacrossthespectrum;leavers
Ricci’s"OperationColumbus"1Ricci,45,isnowstrikingoutonperhapshisboldestventureyet.HeplanstomarketanEngl
TheHeadofSlateofCanadaisrepresentedby______.
The3rdgenerationofprogramminglanguagesharesallthefollowingcharacteristicsEXCETPWhichprogramminglanguageisdesign
Theword"orator"originallymeantspeaker;butnowitsignifiesthepersonwhomakesspeech.Thisisanexampleof______.
随机试题
胃溃疡表现为溃疡性结肠炎表现为
A.罗格列酮B.地西泮C.苯巴比妥D.卡马西平E.利奈唑胺属于噁唑烷酮类药物的是()。
全国公路工程施工招标投标活动的监督管理由谁负责()
函数关系实际上是( )关系。
下列关于投资性房地产后续计量,说法正确的是()。
甲股份有限公司(以下简称“甲公司”)系一家上市公司,2×15年至2×17年对乙股份有限公司(以下简称“乙公司”)股权投资业务的有关资料如下:(1)2×15年5月16日,甲公司与乙公司的股东丙公司签订股权转让协议。该股权转让协议规定:甲公司以5400万元收
每当有新闻事件发生,围观群众在期待意见领袖表态的同时,也期待着段子手的微博更新,前者负责提供观点,后者负责提供笑料,大家共同炒热话题,一不留神就创造了令外国友人惊叹的社交媒体新纪录。如果这段文字还有下文,最有可能讲述的是()。
在商品生产过程中,生产资料的价值是借助于生产者的
ToyLearnisanexcitingstart-upcompanythathasdevelopedalineofeducationaltoolsforchildren(31)arefunandengaging
Whatisthemainideaofthispassage?Theauthor’stoneinthispassageis______.
最新回复
(
0
)