首页
登录
职称英语
Lichens can be spectacular for anyone who cares to look, but few people tak
Lichens can be spectacular for anyone who cares to look, but few people tak
游客
2023-11-19
59
管理
问题
Lichens can be spectacular for anyone who cares to look, but few people take the trouble. Often modestly colored, and seemingly two-dimensional as they cling to whatever surface they find, they grow in background - as though designed to be ignored. Yet they hold a special fascination for botanists, partly because they present mysteries still to be solved and partly because they do so many things so well.
No casual observer ’of a lichen would ever suspect that it was a composite of interacting life forms. This seemingly uncomplicated lichen is actually composed of a fungus and a colony of algae (or blue-green algae, which some scientists now consider to be bacteria). A few species even include all three of these diverse forms of life. A complete lichen is strikingly different from its separated partners in both appearance and biochemistry-many produce unique compounds which cannot be made by the component organisms alone.
Lichens grow in almost every natural habitat imaginable, from deserts to tropical rain forests-even on the backs of certain beetles in New Guinea, and i0side rocks (along with algae ) in the otherwise barren dry valleys of Antarctica.
Many species can tolerate extreme heat, cold. or dryness. Very few, however, can survive heavy air pollution, and many live only where the air is very clean. The disappearance of lichens from an area gives warning of a threatened environment. [br] All of the following are mentioned as being a part of the lichen EXCEPT ______.
选项
A、a fungus
B、algae
C、a beetle
D、bacteria
答案
C
解析
细节题。第二段第二句话:这看似并不复杂的地衣事实上是有菌类和藻类组成。
转载请注明原文地址:https://tihaiku.com/zcyy/3199673.html
相关试题推荐
HowmanypeoplehavefledtheirhomesinMogadishu?[br][originaltext]The
HowmanypeoplehavefledtheirhomesinMogadishu?[originaltext]TheUnite
Tospendtheirleisuretime,Polishpeople______.[originaltext]Peoplein
IguessJonesdidn’thaveachancetowintheelection.Almostallofthepeople
Lichenscanbespectacularforanyonewhocarestolook,butfewpeopletak
Whywouldanyonewanttosetasideadaytohonoralowlylittlegroundhog?
Whywouldanyonewanttosetasideadaytohonoralowlylittlegroundhog?
Iftapwaterwereasdangerousassomepeoplethink,______wouldbegettingsic
Theyoungpeoplearebecomingincreasinglyfilm______.A、consciousB、conscience
Threatsfromnomadicpeopleinthenorthwere【C1】______throughoutChinese
随机试题
[originaltext]M:IjustreceivedanE-mailfromoneofmyformerclassmates.I
[originaltext]Q:Howmanypeoplewillattendthemeeting?[/originaltext]A、About
[originaltext]W:Janemissedtheclassagain,didn’tshe?Iwonderwhy?M:Well
下列关于球墨铸铁管道铺设施工的说法中,表述正确的是()。A.接口工作坑每隔一个
用于眼部的散剂应通过A.4号筛 B.5号筛 C.6号筛 D.7号筛 E.
乙酰胆碱作用消失主要依赖A.胆碱酯酶水解B.摄取C.排泄D.胆碱乙酰转移酶的作用
下列各句中,加点的成语使用不恰当的一项是()。A. B. C. D.
根据《幼儿园工作规程》幼儿园品德教育的主要内容是( )。A.纪律教育和培养遵纪
房地产开发项目的全寿命周期包括()等阶段。A:项目前期策划 B:规划设计 C
设高温热源的热力学温度是低温热源的热力学温度的n倍,则理想气体在一次卡诺循环中,
最新回复
(
0
)