The essay should include the area you are interested in, why the specific program is attractive to you, what you have done in the past that is relevant, and the significance of what you did. Cell, Molecular, and Developmental. Ecology and Evolutionary Biology. It is important to be focused in what you want to study. Schedule visits with schools that have programs that interest you.
Many graduate programs like to meet prospective students.
Many schools will defray all or part of costs of visits if you are among their top choices. Visits can provide very helpful information for deciding which program is best for you. If invited, you should make every effort to visit. Most programs provide grad students a stipend and cover tuition. Ask professors about best choices, and their pros and cons.