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
2025-01-23
28
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] According to the passage, the algae ______ .
选项
A、may not carry on photosynthesis alone
B、supply food to the fungi
C、can’t live separately
D、aren’t recognizable as a species
答案
B
解析
细节题型见第二段第六句:The algae进行光合作用并为the fungi提供食物。因此B为答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3925684.html
相关试题推荐
Whenisanordinarytropicalstormcalledahurricane?[br][originaltext]I
Whenisanordinarytropicalstormcalledahurricane?[br][originaltext]I
Whenisanordinarytropicalstormcalledahurricane?[originaltext]Inthe
WheninAustraliarecently,Ivisitedaeucalyptusforestthatwasoncethe
林边有个洞,叫白龙洞。传说《白蛇传》中的白娘子曾经在这里修炼。NeartheforestistheWhiteDragonCavewhichis
EarlyMaoriadaptedthetropicallybasedeastPolynesiancultureinlinewith
Lichensmaygrowonthebarkofatreeinasteamingtropicalrainforest,o
Lichensmaygrowonthebarkofatreeinasteamingtropicalrainforest,o
Lichensmaygrowonthebarkofatreeinasteamingtropicalrainforest,o
Lichensmaygrowonthebarkofatreeinasteamingtropicalrainforest,o
随机试题
The______nowseemstostandastheprimarybarriertoaneweraofstrongecon
[originaltext]W:Howwillyouspendyoursummervacation?M:AtfirstIthought
在下列事故中,属于市政公用工程施工项目安全生产最常见的职业伤害事故是()。
A.135kN-m B.45kN-m C.240kN-m D.80kN-m
患者女,41岁。第7、8胸椎结核病灶清除术后2年。近3个月来又出现盗汗低热、背痛
早产儿,孕33周分娩,出生时有青紫窒息,生后5小时出现呼吸困难与发绀,且进行性加
肾病患儿禁盐1个月,水肿不消,近3天加用利尿剂,1天来嗜睡,半日来惊厥2次,血压
胃癌最多发生于A.贲门部 B.胃小弯 C.胃窦部 D.胃大弯 E.胃后壁
指出“无论我们选教何种学科,都必须使学生理解该学科的基本结构”的教育家是()
下列不易出现高脂血症的疾病是A.糖尿病 B.肾病综合征 C.阻塞性黄疸 D
最新回复
(
0
)