A. Some species are more important than others. B. All species are equally important for maintaining the balance. C. Larger species are the most important. D. Smaller species are less important. 相关知识点: 试题来源: 解析 B。本题考查对生态平衡中不同物种重要性的理解。选项 A“more important...
解析 C。keystone species(关键物种)的丧失会对生态平衡产生重大影响。biodiversity(生物多样性)是生态系统的一个特征;ecological succession(生态演替)是生态系统的发展过程;ecological niche(生态位)是物种在生态系统中的角色。本题考查生态平衡相关术语。反馈 收藏 ...
A. It reduces competition among species so that they can co - exist, which helps maintain the balance of the ecosystem B. It allows species to have more space to reproduce, which is good for increasing biodiversity C. It makes each species more independent, so that when one species is in...
What is species diversity? A. The number of species in an ecosystem. B. The variety of different species living in an ecosystem. C. The size of an ecosystem. D. The health of an E. cosystem. 相关知识点: 试题来源: 解析 B。中文解析:物种多样性指的是生活在一个生态系统中的不同物种的...
【题文】 How does an ecosystem(生态系统)work?What makes the populations of different species the way they are?Why are there so many flies and so few wolves?To find an answer,scientists have built mathematical models of food webs,noting who eats whom and how much each one eats. With such...
【题目】How does an ecosystem(生态系统)work? What makes th e populations o f different species the way they are? Why ar e ther e so many flies a nd so few wolves? To find an answer, scienti sts hav e built mathematical models o f food w ebs, noting who eats whom and how much...
5.根据文章最后一段Ideally, the system would tell us when to adapt human activities that are pushing an ecosystem toward a breakdown or would even allow us to pull an ecosystem back from the borderline. Prevention is key, scientists say, because once ecosystems pass their tipping point (临界点...
In an ecosystem, the ___ of a species refers to the role it plays and the resources it uses. A. habitat B. population C. niche D. community 相关知识点: 试题来源: 解析 C。解析:选项A“habitat”指的是物种生活的栖息地,是一个地理区域;选项B“population”指的是种群,是同一物种个体的集合...
【题目】How does an ecosystem(生态系统)work? What makes th e populations of different species th e way they ar e? Why ar e ther e so many flies and so few wolves?T o find an answer, scientists hav e built mathematic al models of food webs, noting who eats whom and how much each...
How does an ecosystem (生态系统) work?What makes the populations of different species the way they are?Why are there so many flies and so few wolves?To find an answer,scientists have built mathematical models of food webs,noting who eats whom and how much each one eats. With such models...