Opossums that live on barriers islands off the coast of Virg…

Opossums that live on barriers islands off the coast of Virginia can live longer than mainland animals, but they produce fewer offspring each year. These differences are heritable. What is a good explanation for differences in life history characters of these two opossum populations?

Nadja would like to study gender differences in interpersona…

Nadja would like to study gender differences in interpersonal style in nightclubs. She hypothesizes that women are more socially aggressive than men. To test her hypothesis, she sits in a bar watching both male and female patrons. Which method of research was she using?