本题目来源于试卷: Interaction & Interdependence C.8 Populations & Communities，类别为 IB生物学
[单选题]
The cyclical variations 02e2d2e fb:q rqajtopy(o9e5 in the pop p*)bzj( /y +(uy p brfadb.)olv spz9)ulation densities of a predator and its prey a /b asp9y)l()d pzj ( .pbu*b)rozyfv+ re shown in the image below.
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Which of the following factors may have the least direct effect on the populations of the predator and prey species depicted here?
A. Pressure due to predation
B. Reproductive rate of predators
C. Food availability
D. Weather conditions
参考答案: D
本题详细解析:
The weather (Choice D)does not play a significant role in the growth of 0mrlq 2t*p:n0jp nv p4the predator-prey population but could influence it. It may impact the behavilv jpp :p0r2* nmqt4n0our or visibility of the predator or prey indirectly. The other factors play a more prominent role.
Predators sometimes exert a significant and direct influence on prey populations by consuming them, decreasing the prey population. As the predator population increases, the predation pressure (Choice A) on the prey increases, leading to a decline in the prey population. The reproductive rates of predators and prey play a role in the growth of the populations. The prey usually has a higher reproductive rate (Choice B). The availability of food impacts both predator and prey. A decrease in the prey population will cause a decline in the predator population, leading to cyclical variations in predator and prey population densities (Choice C).
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