本题目来源于试卷: Interaction & Interdependence C.8 Populations & Communities，类别为 IB生物学
[单选题]
Which of the following does not apply to, cd.iz3;go8at/bf su pr7gsl48m keus3por4tx)c6ga j3b/8oyi pq 7j:edator-prey relationships?
A. Density-dependent control of the population
B. Positive feedback control of predator and prey populations
C. Interspecific competition between predator and prey
D. Predators and prey occupy different trophic levels in an ecosystem
参考答案: C
本题详细解析:
Interspecific competition (Choice C) refers to competition between different s2 vp3mk*ic 2xngag3,4,2uoj k,nwb zfpecies for the same resources. In predator-prey relationships, the interactions a amn3x2b*ngp o2j,k,gfcvz2,34k uiwre primarily based on predation and consumption of one species by another, rather than competition for the same resources. Therefore this statement is not true of predator-prey relationships, and Choice C is the correct answer.
Predator and prey living in the same ecosystem leads to density-dependent control of their populations (Choice A). As prey populations increase, predator populations may also increase due to the availability of more food. However, as predator populations increase, they put more pressure on prey populations, which can lead to a decrease in prey numbers. Choice A is therefore true of predator-prey relationships and so not the correct answer.
Negative feedback control occurs when changes in one population lead to changes in the other population that oppose the initial change. Increases in the prey population will lead to an increase in the predator population, which then causes a decrease in the prey population, leading to a reduction in the predator population. The population sizes of both predator and prey are maintained by negative feedback loops. Choice B is therefore true of predator-prey relationships and so not the correct answer.
Predators are typically higher in the food chain than their prey, so they usually occupy different trophic levels. Choice D is therefore true of predator-prey relationships and so not the correct answer.
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