An organism's role within an ecosystem depends on how it obtains its food.Plants and animals obtain their food in very different ways,so they have very different roles in an ecosystem.The way in which an organism obtains food also affects its interactions with other organisms in the ecosystem...
生物在生态系统里只可能扮演一个角色。
Temperature plays a crucial role in an ecosystem. For most organisms, which temperature range is more suitable for their normal life activities? A. Extremely high temperature B. Extremely low temperature C. A relatively stable and appropriate temperature range D. Any temperature ...
Decomposers play an important role in the ecosystem. Which of the following organisms are decomposers? A. Lions B. Mushrooms C. Grasshoppers D. Sunflowers 相关知识点: 试题来源: 解析 B。解析:本题考查分解者的概念及相关生物。选项A,狮子是肉食性动物,属于消费者,它通过捕食其他动物来获取能量,A错误...
解析 B。解析:在海洋生态系统中,海藻通过光合作用产生氧气,在氧气产生方面起着关键作用。选项A鲨鱼是海洋中的捕食者,并不主要负责产生氧气。选项C螃蟹主要是海洋中的消费者,与氧气产生关系不大。选项D章鱼也是消费者,不是产生氧气的主要生物。反馈 收藏
In an ocean ecosystem, which of the following organisms plays a key role in providing oxygen? A. Sharks B. Corals C. Phytoplankton D. Whales 相关知识点: 试题来源: 解析 C。解析:在海洋生态系统中,鲨鱼是消费者,珊瑚是海洋生物栖息地的构建者,鲸鱼也是消费者。而浮游植物(phytoplankton)通过光合作用...
TF169-Early Research in Organic Chemistry 00:50 TF170-Early Modern Industrialization 00:57 TF179-How Soils Formed 00:47 TF171-Attempts at Determining Earth’s Age 00:56 TF178-The Role of Diapause 01:04 TF177-Constraints on Natural Selection ...
In an ecosystem, plants with wide distribution can influence other organisms greatly. Which of the following statements about it is correct? A. They only provide shelter for small animals B. They can be a food source for all animals C. They play a role in oxygen production and carbon ...
In a coral reef ecosystem, which organisms play a fundamental role in building the reef structure? A. Sharks B. Seaweeds C. Corals D. Jellyfish 相关知识点: 试题来源: 解析 C。解析:在珊瑚礁生态系统中,珊瑚在构建礁体结构方面起着根本性的作用。珊瑚虫分泌钙质骨骼,经过长时间堆积形成珊瑚礁。选项...
(细菌)playaroleatthethirdstage.Theybreakdownwhathasbeenleft.Thisstagecanlastaslongas100years.米严毛其生形世 ThewhalefallfoundintheSouthChinaSeais3meterslong.Itisstillatthefirststage.Thescientistssaiditwouldtakethemalongtimetostudythewhalefallbecausetheyknewitwouldhelpthemunderstandthedeep-seaecosystembetter.米...