GRE Reading Comprehension: JiJing 352-GRE阅读机经352篇 - P016IN94T5MY54RXJ

The passage is primarily concerned with A. examining the relationship between the complexity of organisms and the complexity of the conditions under which they evolved B. providing evidence derived from studies of vertebrate and ammonoid species to illustrate the effects of natural selection C. establishing the relationship between the relative complexity of species and their survival over time D. evaluating the usefulness of competing definitions of biological complexity E. considering whether natural selection consistently results in the evolution of biological complexity