22. Which of the following, if true, would call into question Hardys principle of animal exclusion?
Zooplankton are not the only organisms that are affected by phytoplankton repellents.
Zooplankton exclusion is unrelated to phytoplankton population density.
Zooplankton population density is higher during some parts of the year than during others.
Net phytoplankton are more likely to exclude zooplankton than are nannoplankton.
Phytoplankton numbers can be strongly affected by environmental factors.
23. 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.
I only
III only
I and II only
II and III only
I, II, and III
24. The passage supplies information to indicate that Hargrave and Geens 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?
【gre阅读练习每日一篇(二十七)】相关文章:
最新
2016-03-01
2016-03-01
2016-03-01
2016-03-01
2016-03-01
2016-03-01