GRE Text Completion: JiJing 1373-GRE填空机经1373题 - XWKD76T0NQ71UPWKA

Studies of hermaphroditic plants may exhibit sampling bias against self-fertilizing and cross-fertilizing species, thus inflating the frequency of species using a mixed mating system (both self-fertilizing and cross-fertilizing); nevertheless the number of mixed-system species is not ____________. A. self-evident B. static C. trivial D. relevant E. calculable