I haven't personally done any experiments in biology, but I believe control group'ing and randomization is so basic that if they haven't done that, they're prob

I haven't personally done any experiments in biology, but I believe control group'ing and randomization is so basic that if they haven't done that, they're probably not trying to seriously study the issue. The purpose is to try to diminish a bunch of systematic errors in the setup of the experiment. Systematic errors lead to stupid wild goose chases of side effects of the experiments themselves, rather than actual interesting effects.