Here we extend this work by looking at embryos as model systems for following bacterial infection in real time. (journals.plos.org)
The value of spiders, particularly web - building spiders, as model systems for sexual selection is becoming increasingly evident [1], [2]. (journals.plos.org)
And we've learned a lot about that in model systems, such as in fruit flies, worms, and mice. (discovermagazine.com)