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
What evolutionary change in birds led to a nest’s building?
What evolutionary change in birds led to a nest’s building?
admin
2016-01-14
29
问题
What evolutionary change in birds led to a nest’s building?
Many egg-laying animals merely lay their eggs and leave. Turtles, for instance, and horseshoe crabs, the eggs are hatched and the little ones are on their own. The current theory about birds is the earliest birds did just that when they were cold-blooded creatures living in warm places. However, when they became warm-blooded creatures living in cold places, they had to remain on the eggs to keep them warm. For this, they needed a place—a nest. Very likely, the first nest was just a primitive hole scraped in the ground. Even now many species still lay eggs in this sort of crude nest. Primitive nests found on the ground were fine for some birds, but others began to elevate their nests in branches, perhaps to avoid predators. These early elevated nests were probably cup-shaped nest. This type is still built by some birds today. The latest development in nest, the most recent vision, so to speak, is the cup-shaped nest. This is the one we regard today as the typical bird’s nest, you know, like a robin’s nest.
选项
A、A hole scraped in the ground
B、Cup-shaped nest
C、Platforms of sticks and dried leaves
答案
B
解析
从倒数第二句The latest development in nest,the most recent vision,so to speak,is thecup-shaped nest.可知鸟巢的最新形式是杯状。
转载请注明原文地址:https://kaotiyun.com/show/EOkK777K
本试题收录于:
D类竞赛(专科)题库大学生英语竞赛(NECCS)分类
0
D类竞赛(专科)
大学生英语竞赛(NECCS)
相关试题推荐
A.understoodB.lengthC.optimismD.bridalE.happenedF.evenG.ideaH.converselyI.experienceJ.conceptK.oppo
A.understoodB.lengthC.optimismD.bridalE.happenedF.evenG.ideaH.converselyI.experienceJ.conceptK.oppo
RecommendationWriteanoteofabout50-60wordsbasedonthefollowingsituation:Youareaprofessor,andyourstudent
Writeanoteofabout50-60wordsbasedonthefollowingsituation:Yourformermiddle-schoolteachergaveyousomegoodadv
HowtoBuildaStrongTeamSpirit1.Threeprinciplestobuildingateam■Teamworkisbasedon【T1】______【T1】_
AdventureTheideaofadventurehasalwayscapturedtheimagination./Theideathatjustoverthenexthilltherewillb
TheSpaceRaceThespaceracebetweentheUnitedStatesandtheformerSovietUnionbeganinOctoberof1957,/whenthe
TheSolarWaterHeaterSolarwaterheatersareusedaroundtheworldandarenotverydifficulttobuild./Therearetwo
In2014,manyshoppersoptedtoavoidthe【C1】________crowdsanddotheirholidayshoppingfromthecomfortoftheircomputer.S
这是一本自助手册,用来帮助人们保持健康,无需经常看医生。(without)
随机试题
A.Hegar征B.Montgomery’s结节C.BraxtonHicks收缩D.Meigs征E.仰卧位低血压综合征乳头乳晕着色,乳晕上的皮脂腺肥大形成散在的结节状小隆起
A.主量子数B.角量子数C.磁量子数D.自旋量子数E.电子壳层决定电子的自旋状态的是
监理工程师在业主授权范围内根据施工现场的实际情况,在确属需要时有权发布变更指示。指示的内容应包括( )。
E钢铁公司棒材厂的加热炉使用煤气为燃料。2008年4月9日8时,棒材厂1号加热炉停产检修,更换煤气阀组后面的补偿器。11时更换完补偿器后,由工长甲负责组织引煤气。按照引气操作程序,先用氢气对加热炉进行吹扫置换,经检测合格后才能引煤气点火。工长甲让
商品化会计报表系统的特点是()。
教育目的与教育方针的主要区别在于教育目的强调培养人的质量和规格,而教育方针强调办什么样的教育,怎样办教育。()
下列属于教学过程本质说的有()
一、注意事项1.本试卷由给定资料与作答要求两部分构成。考试时限150分钟。满分100分。2.作答参考时限:阅读资料40分钟作答110分钟。3.仔细阅读给定资料,按作答要求依次作答。答案要写在指定位置。不在指定位置作答的,不得分。4.
崛起最本质的意义,是在________体系中相对力量的快速增强。有力量________是一件好事,但也可能是一件坏事。崛起带给中国决策层和知识分子最________的议题之一是:如何看待中国力量的快速增长?更进一步,中国应该如何运用已经或即将获得的力量?
在工作中防止“过”或“不及”的关键在于()。
最新回复
(
0
)