In an ecosystem, energy flows from ___. A. producers to consumers B. consumers to producers C. decomposers to producers D. producers to decomposers 相关知识点: 试题来源: 解析 A。本题考查生态系统中能量的流动方向。能量从生产者流向消费者,再流向分解者。生产者通过光合作用将太阳能转化为化学能,...
The Belt and Road Initiative is a creative development that takes on and carries forward the spirit of the ancient silk routes – two of the great achievements in human history and civilization. It enriches the ancient spirit with the zeitgeist and culture of the new era, and provides a platf...
In an ecosystem, energy starts from the sun, then it is absorbed by plants through photosynthesis. The plants are eaten by herbivores, and the herbivores are eaten by carnivores. This process shows that energy in the ecosystem _. A. moves in one direction only B. can be recycled C. ...
In an ecosystem, energy flows from producers to consumers. Which of the following is a producer? A. rabbit B. fox C. grass D. eagle 相关知识点: 试题来源: 解析 C。本题考查生态系统中的生产者概念。生产者是能通过光合作用制造有机物的生物,草能进行光合作用,是生产者。
A. Dead organisms and waste materials B. The sun directly C. Living plants D. Living animals 相关知识点: 试题来源: 解析 A。解析:分解者主要分解死亡的生物体和有机废物,从中获取能量,它们不能直接利用太阳光能,也不是从活着的动植物中获取能量(活着的动植物是其他营养级的能量来源)。
In an ecosystem, energy flows from producers to consumers. Which is an example of a producer? A. Lion B. Rabbit C. Grass D. Fox 相关知识点: 试题来源: 解析 C。解析:生产者是指能够自己制造食物的生物,草是生产者,能通过光合作用制造有机物。狮子、兔子和狐狸都是消费者。
The energy in an ecosystem mainly comes from___. A. the sun B. water C. air D. minerals 相关知识点: 试题来源: 解析 A。解析:生态系统中的能量主要来自太阳,生产者通过光合作用将太阳能转化为化学能。水、空气和矿物质不是能量的主要来源。
A. Energy can be recycled within the ecosystem B. Energy is transferred from consumers to producers C. Energy is lost as it moves through the trophic levels D. All E. nergy is stored in the top - level consumers 相关知识点: 试题来源: 解析 C。解析:在生态系统的能量流动中,能量在从一个...
生产者通过光合作用等方式将太阳能转化为化学能,然后沿着食物链传递给消费者,消费者被分解者分解后,能量释放到环境中。消费者不能自己制造能量,需要从生产者获取;分解者是分解有机物释放能量,不是能量流动的起始;肉食动物是消费者的一部分,也不是能量流动的开始。
A. Plants B. Animals C. Decomposers D. All of the above 相关知识点: 试题来源: 解析 D。解析:植物通过光合作用固定太阳能,是能量的最初来源;动物是消费者,依赖植物获取能量;分解者能将动植物遗体等分解,释放出能量和物质供生态系统循环利用,所以以上三者都是生态系统能量流动中重要的部分。