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
原文:Although sampling bias against both selfing and highly outcrossing species
may inflate the frequency of mixed-mating populations , the number of species reported to show mixed mating is not trivial
所以=:虽然频率看似被夸大了,其实真实数量并不少