A. The upward arrows between trophic levels B. The side arrows from each trophic level C. The downward arrows between trophic levels D. The arrows within E. ach trophic level 相关知识点: 试题来源: 解析 B。解析:在表示生态系统能量流动的图中,营养级之间向上的箭头表示能量传递,向下的箭头不符合...
Consider the energy flow in an ecosystem. The sun provides energy to plants. When a rabbit eats the plants, only a part of the plant's energy is transferred to the rabbit. Why? A. Some of the plant's energy is used for the plant's growth B. The rabbit cannot digest all the plant...
Which of the following shows the correct energy flow in an ecosystem? A. animals → plants → sun B. sun → plants → animals C. animals → sun → plants D. plants → animals → sun 相关知识点: 试题来源: 解析 B。生态系统中正确的能量流动是从太阳到植物(生产者通过光合作用固定太阳能)...
In an aquatic ecosystem, if the phytoplankton (producers) suddenly die out, which of the following will happen first? A. The number of zooplankton (primary consumers) will increase B. The energy flow in the ecosystem will stop C. The secondary consumers will start to produce their own food ...
The first step in energy flow in an ecosystem is: A. photosynthesis by producers B. consumption by consumers C. respiration by decomposers D. breakdown of waste by decomposers 相关知识点: 试题来源: 解析 A。生态系统中能量流动的第一步是生产者通过光合作用固定能量。选项 B 消费者的消费不是第一...
百度试题 结果1 题目Each step in the flow of energy through an ecosystem is known as a___. ( ) A. food chain B. food web C. consumer D. trophic level 相关知识点: 试题来源: 解析 D 反馈 收藏
Energy Flow in the EcosystemRicklefs, Robert E
A. water B. energy C. air D. minerals 相关知识点: 试题来源: 解析 B。本题考查食物链的概念。食物链表示生态系统中能量的流动方向。选项 A 水在生态系统中也很重要,但食物链不表示水的流动;选项 C 空气不是食物链所表示的内容;选项 D 矿物质也不是食物链所表示的内容。反馈...
A. Plants directly get all their energy from other organisms B. Plants convert sunlight energy into chemical energy which then flows through the ecosystem C. Plants only use chemical energy from the soil D. Plants do not contribute to the E. nergy F. low in an ecosystem ...
negative feedback loopA feedback loop in which a system responds to a change by returning to its original state, or by decreasing the rate at which the change is occurring. net primary productivity (NPP)The energy captured by producers in an ecosystem minus the energy producers respire. ...