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GRE阅读模拟在线练习附答案一百六十七

2018-11-26 16:44:00来源：网络

　　Which of the following, if true, would call into question Hardy's principle of animal exclusion?

　　A.Zooplankton are not the only organisms that are affected by phytoplankton repellents.

　　B.Zooplankton exclusion is unrelated to phytoplankton population density.

　　C.Zooplankton population density is higher during some parts of the year than during others.

　　D.Net phytoplankton are more likely to exclude zooplankton than are nannoplankton.

　　E.Phytoplankton numbers can be strongly affected by environmetnal factors.

　　The author would be likely to agree with which of the following statements regarding the pressure of grazers on phytoplankton numbers?

　　I. Grazing pressure can vary according to the individual type of zooplankton.

　　II. Grazing pressure can be lower in nutrient- poor lakes than in bog lakes.

　　III.Grazing tends to exert about the same pressure as does temperature.

　　A.I only

　　B.III only

　　C.I and II only

　　D.II and III only

　　The passage supplies information to indicate that Hargrave and Geen's conclusion regarding the grazing pressure exerted by zooplankton on phytoplankton numbers was most similar to the conclusion regarding grazing pressure reached by which of the following researchers?

　　A.Hardy

　　B.Lund

　　C.Round

　　D.Reynolds

　　E.Haney

　　It can be inferred from the passage that one way in which many of the early researchers on grazer control could have improved their data would have been to

　　A.emphasize the effects of temperature, rather than of light, on phytoplankton

　　B.disregard nannoplankton in their analysis of phytoplankton numbers

　　C.collect phytoplankton of all sizes before analyzing the extent of phytoplankton concentration

　　D.recognize that phytoplankton other than net phytoplankton could be collected in a net

　　E.understand the crucial significance of net phytoplankton in the diet of zooplankton

　　According to the passage, Hargrave and Geen did which of the following in their experiments?

　　A.They compared the grazing rates of individual zooplankton species in the laboratory with the natural grazing rates of these species.

　　B.The hypothesized about the population density of grazers in natural habitats by using data concerning the population density of grazers in the laboratory.

　　C.They estimated the community grazing rates of zooplankton in the laboratory by using data concerning the natural community grazig rates of zooplankton.

　　D.They estimated the natural community grazing rates of zooplankton by using data concerning the known population density of phytoplankton.

　　E.They estimated the natural community grazing rates of zooplankton by using laboratory data concerning the grazing rates of individual zooplankton species.

　　Which of the following is a true statement about the zooplankton numbers and zooplankton grazing rates observed in Haney's experiments?

　　A.While zooplankton numbers began to decline in August, zooplankton grazing rates began to increase.

　　B.Although zooplankton numbers were high in May, grazing rates did not become high until January.

　　C.Both zooplankton numbers and grazing rates were higher in December than in November.

　　D.Both zooplankton numbers and grazing rates were lower in March than in June.

　　E.Both zooplankton numbers and grazing rates were highest in February.

　　正确答案:A D B C E C E D

　　以上就是关于“GRE阅读模拟在线练习附答案一百六十七”的内容，更多精彩内容，请关注GRE频道!


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