GRE Reading Comprehension: JiJing 352-GRE阅读机经352篇 - FG74C_242Y04448PJ

The primary purpose of the passage is to A. examine the impact of certain research findings regarding changes to ecosystem biodiversity. B. discuss a possible implication of a difference between terrestrial and marine food supply sources. C. describe the consequences of a certain kind of interaction between terrestrial and marine ecosystems. D. identify an area of ecosystem research in which here are significant uncertainties E. present evidence that undermines one side of a debate about biodiversity and supports the other.