dogs belong to a single species , but that species is comprised of different breeds
{"Image DocumentName": "Dogs belong to a single species, Canis familiaris, but that species is comprised of about 400 different breeds.", "Image ImageDescription": "Since they are a single species, they can mate and have viable offspring. Recognized dog breeds take generations to establish through selective breeding or artificial selection. Many of the breeds we have today are the result of people s desire to have dogs with specific features that make them suitable for performing particular tasks, such as retrieving, protection, assistance, hunting, and companionship, to name just a few. The process of breeding a new type of dog often involves identifying desired features, finding dogs with those features, then performing a series of matings to produce offspring with the appropriate combination of traits. After a number of generations, a new breed may be established..", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}