首页
登录
职称英语
[originaltext] Most animals use more than one species as food. Therefore, th
[originaltext] Most animals use more than one species as food. Therefore, th
游客
2023-09-12
74
管理
问题
Most animals use more than one species as food. Therefore, the term "food web" is better description of food relationships than "food chain". A food web is a complex feeding system that contains several food chains. For example, mice, rabbits, and deer eat plants. Owls eat mice and rabbits. Mountain lions eat rabbits and deer. These five species are parts of food chains that together form a food web.
The first link in a food chain is always a green plant. Only organisms with chlorophyll, such as green plants, can make food. For example, the first link in aquatic food chains is algae. Most algae are microscopic green plants that produce food by photosynthesis. In photosynthesis, energy from sunlight converts carbon dioxide and water to sugar. Tiny fish in lakes, streams, and oceans eat; in turn, these tiny fish are eaten by larger fish. The larger fish are eaten by still larger fish. The food supply for fish is made by algae. This food is then passed through the food chains as one animal eats another.
Organisms may be divided into three groups based on how they obtain food. These groups are producer, decomposer, and consumer. Organisms containing chlorophyll are producers. Thus, green plants are producers. Animals that eat other animals and plants are consumers. Microbes, on-celled organisms that cause the decay of dead plants and animals are decomposers. Since decomposers cannot make their own food, they are also consumers.
选项
A、A complicated system of several food chains.
B、A society that distributes food.
C、The relationship of one green plant to another.
D、The device that spiders use to catch food.
答案
A
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3007458.html
相关试题推荐
[originaltext]IfthepopulationoftheEarthgoesonincreasingatitspres
[originaltext]IfthepopulationoftheEarthgoesonincreasingatitspres
[originaltext]IfthepopulationoftheEarthgoesonincreasingatitspres
[originaltext]Accordingtosociologists,thereareseveraldifferentwaysi
[originaltext]Accordingtosociologists,thereareseveraldifferentwaysi
[originaltext]W:Thedoctorshouldbeabletoseeyouinafewminutes.Ijust
[originaltext]Sincethefirstprehistoricartistdrewthefirstpictureson
[originaltext]AnewschoolyearhasbeguninAmerica.Butsomechildrendo
[originaltext]Goodafternoon.IwanttothankProfessorJonesforgivingme
[originaltext]Goodafternoon.IwanttothankProfessorJonesforgivingme
随机试题
WhathappenedtothefivesuspectedSomalipirates?[br][originaltext](21)
老师适时记录学生成绩,怎么看?
见于慢性再生障碍性贫血A.轻度皮肤黏膜出血伴骨髓增生低下,雄激素治疗有效B.血小
进行路基路面纵断面高程测试时,依次将塔尺竖立在中线的测定位置上,连续测定全部测点
肾病综合征引起水肿的最主要机制是:A.血浆晶体渗透压降低 B.毛细血管滤过压降
从全球学前教育目标的发展趋势来看,20世纪80年代强调( )。A.儿童全面和谐
2017年8月,杭州互联网法院成立。互联网法院将涉及网络的案件从现有审判体
一项研究认为,海洋在类地进行星演化以及气候调节中发挥着重要作用。研究人员表示,我
下列哪一项不属于强行平仓的情形?()A.会员结算准备金余额大于零
基础心理学是研究()。 (A)正常成人心理现象的心理学基础学科 (B
最新回复
(
0
)