GRE Text Completion: JiJing 1373-GRE填空机经1373题 - R5I25VO5AICO0MP7A

Investigating physiological ____________ is not how biologists typically study function and structure, but it is not entirely unreasonable – if abnormalities in the lungs hinder breathing, then the lungs are very likely the organ required for breathing. A. deficiencies B. properties C. theories D. irregularities E. conjectures F. anomalies