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
Darwin discovered two major forces in evolution—natural selection and sexual selection and wrote three radical scientific master
Darwin discovered two major forces in evolution—natural selection and sexual selection and wrote three radical scientific master
admin
2016-08-02
66
问题
Darwin discovered two major forces in evolution—natural selection and sexual selection and wrote three radical scientific masterpieces, "On the Origin of Species"(1859), "The Descent of Man and Selection in Relation to Sex"(1871)and " The Expression of the Emotions in Man and Animals"(1872).
The "Origin", of course, is what he is hest known for. This volume, colossal in scope yet minutely detailed, laid the foundations of modern biology. 【F1】
Here, Darwin presented extensive and compelling evidence that all living beings—including humans have evolved from a common ancestor, and that natural selection is the chief force driving evolutionary change.
【F2】
Sexual selection, he argued, was an additional force, responsible for spectacular features like the tail feathers of peacocks that are useless for(or even detrimental to)survival but essential for seduction.
【F3】
Before the "Origin", similarities and differences between species were mere curiosities; questions as to why a certain plant is succulent like a cactus or deciduous like a maple could be answered only, "Because". Biology itself was nothing more than a vast exercise in catalog and description.
After the "Origin", all organisms became connected, part of the same, profoundly ancient, family tree. Similarities and differences became comprehensible and explicable. In short, Darwin gave us a framework for asking questions about the natural world, and about ourselves.
He was not right about everything. How could he have been? Famously, he didn’t know how genetics works; as for DNA—well, the structure of the molecule wasn’t discovered until 1953. So today’s view of evolution is much more nuanced than his.【F4】
We have incorporated genetics, and expanded and refined our understanding of natural selection, and of the other forces in evolution.
But what is astonishing is how much Darwin did know, and how far he saw. His imagination told him, for example, that many female animals have a sense of beauty that they like to mate with the most beautiful males. For this he was ridiculed. But we know that he was right. Still more impressive: he was not afraid to apply his ideas to humans. He thought that natural selection had operated on us, just as it had on fruit flies and centipedes.
As we delve into DNA sequences, we can see natural selection acting at the level of genes. Our genes hold evidence of our intimate associations with other beings, from cows to malaria parasites and grains.【F5】
The latest research allows us to trace the genetic changes thai differentiate us from our primate cousins, and shows that large parts of the human genome bear the stamp of evolution by means of natural selection.
【F4】
选项
答案
我们已经创立了遗传学,并拓展和提升了我们对于自然选择以及进化过程中其他力量的理解。
解析
转载请注明原文地址:https://kaotiyun.com/show/CEoZ777K
0
考研英语一
相关试题推荐
EnergyCrisis能源危机Writeanessayof160-200wordsbasedonthedrawing.Inyouressay,youshould1)describethedrawingbriefl
BankruptcyratesintheU.S.havebeengrowingformorethantwodecadesdespitegenerallyrisinglevelsofpersonalincome.The
Whatisawomanworth?Thatisthequestionthathastobefacedbydivorcingcouplesandbytheirlawyers.Theanswersseemto
PublichealthofficialsgrapplingwiththeobesityepidemichavedebatedawiderangeofapproachestohelpingslimtheAmerican
Itisasocietyoftheever-wideninggapbetweenpoorandrich,rightandwrong,thediminishingvalueplacedonjusticeandfai
Likeotheracademicinstitutions,businessschoolsarejudgedbythequalityoftheresearchcarriedoutbytheirfaculties.At
ItisnotquiteBenidormyet,butAntarcticahasbecomeanincreasinglypopulardestinationforthemoreadventuroustourist.In
Athleteswhocheatbyinjectingthemselveswithstoredsuppliesoftheirownbloodmightsoonbecaughtout.Arevealingtrailof
Insomecountries,societalandfamilialtreatmentoftheelderlyusuallyreflectsagreatdegreeofindependenceandindividual
Doctorshavetreatedthefirstreportedcaseof"Internetaddictiondisorder"broughtonbyexcessiveuseofGoogleGlass.I
随机试题
女性,41岁,半小时前被车撞伤,诉剧烈胸痛,并有胸闷、呼吸困难、发绀。胸片:左侧第2~9肋多处骨折,右侧肋骨未见明显骨折征象。此患者发生呼吸衰竭的主要原因是
A.氯硝西泮B.苯妥英钠C.卡马西平D.乙琥胺E.扑痫酮癫痫失神发作治疗首选
蛋白质一能量营养不良的最主要病因是
下列说法正确的是()
下列施工投标的内容中,关于投标计算的表述有误的是()。
王某2013年1月1日与地处某镇的饲料厂签订承包合同。经营期限5年。承包费50万元(每年10万元)。合同规定,承包期内不得改变名称,仍以饲料厂的名义对外从事经营业务。王某对经营成果拥有所有权,上缴的承包费在每年的经营成果中支付。该厂为增值税一般纳税人。饲料
现金折扣发生时,销售方应将现金折扣对应的金额确认为营业外支出。()
某班照合影,要求第一排站9人,第二排站10人,第三排站11人,班主任必须站在第一排的中间,则可能的站法有()种.
在我国近代,采取民商分立民事立法体制的政权有()。
Listenbetter,managebetterAThereisagreatdifferencebetweenlisteningandhearing.Youshouldmakeeffortsinliste
最新回复
(
0
)