Family # of species; 1,620 genera including Senecio, Vernonia, and Aster. 22,750: A favorite of horticulturalists, the name of this family comes from the Greek word meaning 'testicle'. 21,950: Sometimes called the pulse family, includes the 'musical fruit'. 19,400: Includes corn, which was domesticated in Mexico some 8,700 years ago. 10,025
According to the U.S. Bureau of Labor Statistics, most students who enter dental schools complete 4-year bachelor's degree programs beforehand (www.bls.gov). Some applicants complete 2-3 years of college prior to applying to dental school and complete their bachelor's degree there.entists may choose to specialize in a particular field of dentistry, such as orthodontics or pediatric dentistry. To become a specialist, dentists must complete 2-4 years of postdoctoral education, and they might be required to complete a 2-year residency program in their field of choice.
Orthodontists are dentists who specialize in diagnosing dental abnormalities and realigning teeth. After earning an undergraduate degree in order to gain admission to a dental school, prospective orthodontists must earn a professional degree in dentistry. After completing dental school, aspiring orthodontists pursue a post-degree training program or a 1-2-year residency in orthodontics.