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
The term biological clock is applied to the means, which living things 【M1】______ adjust their activity patterns, withou
The term biological clock is applied to the means, which living things 【M1】______ adjust their activity patterns, withou
admin
2009-10-19
55
问题
The term biological clock is applied to the means, which living things 【M1】______
adjust their activity patterns, without any obvious cue, the time of day, or 【M2】______
the month, or the year. They are affected but little, if at all, by drugs,
chemical, or wide temperature differences—factors may alter substantially 【M3】______
the rates of all ordinary processes of the body.
The nature of the biological clocks mechanism is still a mystery. Two 【M4】______
quite different theories have been advanced to account to them. According 【M5】______
to the first of these theories, each individual have evolved, aided by natural
selection, an adaptation to the rhythmic environment. It has now 【M6】______
become independence on the environment. According to this view, the clocks 【M7】______
are not perfect timers. They require regular corrections by the natural light
and tide cycles and the changed lengths of the day throughout the year. 【M8】______
The other theory holds up living things react continuously to their 【M9】______
rhythmic physical environment. The setting of their biological clocks,
therefore, involves a constant adjustment to subtle clocks are potential 【M10】______
perfect timers.
【M9】
选项
答案
up
解析
成分多余
转载请注明原文地址:https://kaotiyun.com/show/znt7777K
0
大学英语四级
相关试题推荐
Pleasecomehereattentomorrowmorning________________________(如果你方便的话).
A、It’sgoingtoattractalotofstudents.B、It’sgoingtobealotoffun.C、It’sgoingtorequirealotofreading.D、It’sgoi
Nolivingthingcouldsurviveataventexcepttubeworms.Before1990,nogianttubewormswerefoundinPhoenix.
Nolivingthingcouldsurviveataventexcepttubeworms.Whenanewventforms,tubewormscongregatearounditvoluntarily.
Nolivingthingcouldsurviveataventexcepttubeworms.Thebacteriadependonwormsforhydrogensulfideinthesymbioticr
Nolivingthingcouldsurviveataventexcepttubeworms.Itischemicalsthatsustainventlife.
Formostpeople,theword"fashion",means______.Nowquitealotofstudentswant______.
Ellenwaspleasedtohearpeoplepraisehergreattanskin.MelaninisabestshieldtoblackouttheUVradiation.
随机试题
转子流量计广泛用于()的测量。
6个月患儿,体重5.Skg,身高65cm,生后牛乳喂养,未添加辅食,精神尚可,皮肤略干燥,腹部皮下脂肪0.6cm,可能诊断是
某公司输入一批动物疫苗,该公司应在货物入境前20天报检。( )
根据行政法理论,行政机关工作人员的法律地位体现在()。(2008年)
2016年11月3日20时43分,我国最大推力新一代运载火箭(),在中国文昌航天发射场点火升空.标志着我国运载火箭实现升级换代,运载能力进入国际先进行列。
解放思想、实事求是是马克思主义最本质的内容,是中国特色社会主义理论体系的精髓。下列表述正确的是()。
试证明在完全竞争的市场上,如果一个企业的生产技术具有规模报酬不变的特性,那么如果最大利润存在,它一定是零。[对外经济贸易大学815经济学综合2012研;南开大学832经济学基础2017研]
农业是人类衣食之源,农业是国民经济其他部门得以生存和发展的基础,没有农业,人们就不能生存,社会生产就不能继续下去。众所周知,中国的耕地只占世界可耕地的百分之七,却养活了12亿多人,即世界人口的21%。自从1949年中华人民共和国建国以来,国家高度重视发展农
设f(u)有连续的二阶导数且z=f(exsiny)满足方程=e2xz,求f(u).
Soyou’renewonthejob,newtoyourcareer,newtotheworkplace.Whenyoulookatyourselfinanewmirror,areyouproudof
最新回复
(
0
)