Educação Superior::Ciências Biológicas::EcologiaPresents part of the course, Principles of evolution, ecology and behavior, where Professor Stearns shows the mating systems and parental care vary tremendously from species to species. He argues about every species differs in how it protects its young from predators and provides its young with food, if it does so at all. He shows the mating system, which sex is dominant in mating, and whether fertilization is external or internal will determine much of the process of parental care