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
2015-09-30
32
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.
【F3】
选项
答案
在《物种起源》发表之前,物种之间的相似性与差异性至多只能激发人们的好奇。诸如为什么某种植物,比如仙人掌。是多汁植物,或者为什么枫树每年落叶这样的问题,答案只能是“没有为什么”。生物学本身只不过是对浩瀚资料的编目和描述。
解析
转载请注明原文地址:https://kaotiyun.com/show/oDzZ777K
0
考研英语一
相关试题推荐
SupposeCharlesDarwinhadbeensweptoverboardanddrownedduringthevoyageoftheBeagle.Whatwouldtheworldbelikewithou
SupposeCharlesDarwinhadbeensweptoverboardanddrownedduringthevoyageoftheBeagle.Whatwouldtheworldbelikewithou
Allanimalsmustrest,butdotheyreallysleepasweknowit?Theanswertothisquestionseemsobvious.Ifananimalregularly
Gettingotherpeopletodowhatyouwantthemtodoisanartandasciencethatyoumustmasterifyouwanttosucceedinthis
(46)Attheendofthenineteenthcentury,arisinginterestinNativeAmericancustomsandanincreasingdesiretounderstandNa
Thekeypositionandroleofwomenintheprocessofdevelopmentisincreasinglybeingrecognized.(1)_____thethreegreatWorl
TheuniquenessoftheJapanesecharacteristheresultoftwoseeminglycontradictoryforces:thestrengthoftraditions,andth
Radiationoccursfromthreenaturalsources:radioactivematerialintheenvironment,suchasinsoil,rock,orbuildingmateria
AsGilbertWhite,Darwin,andothersobservedlongago,allspeciesappeartohavetheinnatecapacitytoincreasetheirnumbers
ThemostthoroughlystudiedintellectualsinthehistoryoftheNewWorldaretheministersandpoliticalleadersofseventeenth
随机试题
慢性铅中毒主要引起
男性,30岁,2周前感冒后畏寒、发热、咳嗽,1周前咳大量黄色脓性痰,痰中带血,经青霉素、头孢噻肟等治疗无效。体检:体温40%,呼吸急促,双肺中下闻及湿哕音。血白细胞计数25×109/L,中性粒细胞0.90,X线胸片显示双肺中下斑片状实变阴影,并有多个脓肿和
无效的民事行为是()。
1962年4月4日党中央、国务院做出了《关于加强统计工作的决定》,提出实行“一垂三统”的统计体制,国家统计系统在统计业务上垂直领导,在编制、干部、经费上统一管理。()[2016年中级真题]
根据企业所得税法律制度的规定,下列各项中,应计入应纳税所得额的有()。
某著名作家到甲城市举行新书销售会,签售会上午8时开始,有许多读者提前排队等候入场。假如从第一名读者来到的时间起,每分钟来的读者人数都一样,如果开3个入场通道,8时8分就不再有人排队;如果开5个人场通道,8时4分就不再有人排队。那么,第一名读者到达的时间是:
信息的传输模型中包括信源、编码器、信道、解码器、信宿、噪声等要素。噪声主要对_______形成干扰或影响。
关系数据模型由关系数据结构、关系操作集合和【】三大要素组成。
注意:下面出现的“考生文件夹”均为c:\wexam\25160001。在考生文件夹下有工程文件sjt5.vbp及窗体文件sjt5.frm,该程序是不完整的,请在有?号的地方填入正确内容,然后删除?及所有注释符(即’号),但不能修改其他部分。存盘时
在考生文件夹下,打开文档WORD1.DOCX,按照要求完成下列操作并以该文件名(WORD1.DOCX)保存文档。【文档开始】背景2008-2013年高考报名人数逐年下降从背景教育考试院获悉,背景2013年高考报名工作已经顺利结
最新回复
(
0
)