首页
登录
职称英语
Lichens may grow on the bark of a tree in a steaming tropical rain forest, o
Lichens may grow on the bark of a tree in a steaming tropical rain forest, o
游客
2023-12-27
21
管理
问题
Lichens may grow on the bark of a tree in a steaming tropical rain forest, on the bricks of big city buildings, on rocks in hot springs, on wind-swept mountaintops, and in the driest desserts. In the arctic, they provide the principal food for caribou, and they are one of the few plants that grow in Antarctica. They are pioneers, appearing in barren rocky areas and starting the formation of soil in which mosses, then ferns, and then other plants can take root.
Lichens are a partnership of two plants — fungi and algae. The lichen body is made up of a network of fungal strands. In the upper layers of these grow groups of algae. The two organisms live together to the benefit of both, a relationship known as symbiosis. The fungi provide support, absorb water, and shelter the tender algae from direct sunlight. The algae carry on photosynthesis and provide the fungi with food. The algae can live independently and are recognizable as a species that grows alone. The fungi, on the other hand, cannot live apart from their partners. They can be placed in known classes of fungi but are unlike any species that lives independently.
So definite are the form, color, and characteristics of these double organisms that for hundreds of years, they were classified as one. More than 15,000 "species" were named. If these organisms are classified as separate species, it is difficult to fit them into the existing system of classification. But if they are classified separately, these species of fungi seem rather strange. Lichens are a splendid example of the difficulties faced by taxonomists in classifying species. [br] Lichens may NOT grow ______ .
选项
A、in the tropical woods
B、on the ceilings of city buildings
C、on rocks in hot springs
D、in dry desserts
答案
B
解析
细节题型见第一段第一句,可知选项A、C、D都被提及,所以B为答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3311118.html
相关试题推荐
Whenisanordinarytropicalstormcalledahurricane?[br][originaltext]I
Whenisanordinarytropicalstormcalledahurricane?[originaltext]Inthe
WheninAustraliarecently,Ivisitedaeucalyptusforestthatwasoncethe
如有必要,调查组将给予现场办公更好的保护,林业部野生动物及森林保护司副司长说。VicedirectoroftheMinistryofForestry
EarlyMaoriadaptedthetropicallybasedeastPolynesiancultureinlinewith
Lichensmaygrowonthebarkofatreeinasteamingtropicalrainforest,o
Lichensmaygrowonthebarkofatreeinasteamingtropicalrainforest,o
Lichensmaygrowonthebarkofatreeinasteamingtropicalrainforest,o
Lichensmaygrowonthebarkofatreeinasteamingtropicalrainforest,o
Lichensmaygrowonthebarkofatreeinasteamingtropicalrainforest,o
随机试题
BlairAdmitsNeverHavingSentFlowerstoHisWifeBritishPrimeMinisterTon
Forthispart,youareallowed30minutestowritealetterofapplication.You
TheMaintenanceofParentsBill[br]Byquotingthegrowingpercentagepointsof
【S1】[br]【S10】A、ignoredB、abandonedC、deletedD、canceledA词义辨析题。空格所在句的意思是:咖啡因在心
所示结构,支座2的竖向反力为下列何值?( ) A.0 B.P/8 C.P
尿液酸碱度测定最精确的方法是A.指示剂法 B.滴定法 C.pH试纸法 D.
健康肝脏可以处理多少倍于正常量的胆红素A.4倍 B.10倍 C.6倍 D.
甲将自己电脑出租给乙使用,租赁期间,甲又将电脑卖给丙,并与丙约定于租期届满时由丙
城市轨道交通建设工程验收中,单位工程验收由()组织。A.建设单位 B.运营单位
维生素D缺乏性手足抽搐症的隐性体征是A.巴宾斯基征 B.布鲁津斯基征 C.面
最新回复
(
0
)