解析 B。解析:在苔原生态系统中,苔藓(Mosses)能够生存。蕨类植物(Ferns)通常生长在较温暖、湿润的环境。竹子(Bamboo)生长在温暖湿润且土壤条件较好的环境,如竹林多在亚热带地区。香蕉树(Banana plants)需要高温多雨的热带环境,苔原寒冷干燥,不适合它们生长。
The tundra ecosystem is very fragile, we should avoid ___ there. A. reducing pollution B. traveling carefully C. over - developing D. scientific research 相关知识点: 试题来源: 解析 C。解析:苔原生态系统非常脆弱,我们应该避免过度开发,过度开发会破坏苔原生态;reducing pollution减少污染是保护生态的...
In a tundra ecosystem, which non - biological factor restricts the growth of plants most? A. Short growing season. B. Abundant snowfall. C. Few herbivores. D. High soil acidity. 相关知识点: 试题来源: 解析 A。解析:在苔原生态系统中,短暂的生长季对植物生长的限制最大。大量降雪不是最主要的...
In an Arctic tundra ecosystem, lichens are an important part. What kind of role do lichens play in this ecosystem? A. They are only secondary consumers B. They are both producers and decomposers C. They are only tertiary consumers D. They are only decomposers 相关知识点: ...
解析 B。解析:在不干扰的情况下研究苔原植物、监测苔原气候变化(monitoring the climate change)和记录苔原野生动物都是对苔原生态系统的科学研究行为,不会对其造成危害。而在苔原上修建管道(building pipelines)会破坏苔原的地表、影响当地生物的栖息地等,对苔原生态系统是有害的。
解析 B。本题考查词汇与生态系统知识。在苔原生态系统中,由于环境恶劣,如寒冷、强风等,植物通常是矮小且贴近地面的。Tall and leafy(高大且多叶)不符合苔原植物特征;Large flowers(大花朵)需要更多能量和适宜环境,苔原不具备;Climbing plants(攀缘植物)也不适合苔原环境。
In which ecosystem can you find the most diverse species? A. Desert B. Tundra C. Rainforest D. Grassland 相关知识点: 试题来源: 解析 C。本题关于生态系统中物种多样性。选项 A“Desert”沙漠环境恶劣,物种相对较少;选项 B“Tundra”苔原生态系统条件苛刻,物种不丰富;选项 C“Rainforest”热带雨林气候...
A。解析:本题考查苔原生态系统中生物的适应能力以及相关词汇。北极狐(arctic fox)是生物(biotic factor),它有特殊的适应能力来在寒冷的苔原生态系统中生存,比如厚皮毛等。选项B冰(ice)、选项C雪(snow)和选项D永冻层(permafrost)都是非生物,它们不存在适应寒冷生存的生物特性。反馈...
Plants in the tundra ecosystem usually have short growing seasons. What is the main reason for this? A. There is too much sunlight. B. The soil is too rich. C. The climate is very cold. D. There are too many animals. 相关知识点: ...
A. Reducing the emission of greenhouse gases B. Driving vehicles randomly on the tundra C. Monitoring the tundra environment D. Protecting the unique tundra plants 相关知识点: 试题来源: 解析 B。解析:在保护苔原生态系统时,应该避免在苔原上随意开车。选项B“Driving vehicles randomly on the tundra”...