What is the study of how births, deaths and migration affect population called?

In lowest terms, what is the denominator of the fraction giving the probability of rolling a 2 with one die? What is the occupation of the vast majority of the roughly 3 million members of the NEA? What is the second-place award in an Olympic event? Which plant is New Mexico's state flower, even though the flat area named for it is in Nevada? What is the term for the pictorial writing system developed by the ancient Egyptians? Complete the title of Francis P. Church's 1897 New York Sun editorial: "Yes, Virginia, there is a..." what? At which university will you find the John F. Kennedy School of Government? Jenny Curran is the love of whose life, in a 1994 film, since they were kids growing up in Alabama?