A chauffeur refers to an individual who drives people around for a living. An individual will be required to be fingerprinted before acquiring a chauffeur's licence in New York. An individual may be required to pass a defensive driving course before acquiring a chauffeur's license. In some states, the type of chauffeur license needed will depend on the number of people being transported. In New York, a chauffeur license is a Class E license, which is a taxi license.
Biological magnification (or biomagnification) is the buildup of certain substances, such as DDT, in the bodies of organisms at higher trophic levels of food webs. DDT was once used extensively as an insecticide. DDT builds up in the fatty tissues of organisms.
The total magnification of stereo microscopes is the combined magnification of the magnification changer, the objective and the eyepieces. Like a magnifying glass, the magnification changer consists of optical lenses that can be used to change the magnification of the instrument.