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.
How to become an Orthodontist. In order to become an orthodontist, prospective students must first become licensed to practice as a dentist. There are over 56 dental schools in the United States that are accredited by the American Dental Association (ADA). Dental schools require a minimum pre-requisite of 2 years at college prior to admission into an accredited orthodontic program. Since only 67 programs exist in the United States and Canada, admission into dental school is competitive and all applicants are required to take a Dental Admissions Test (DAT).