A species is a group of organisms that interbreed to produce fertile offspring. Selective breeding is when organisms are deliberately bred so their offspring have the desirable characteristics.

A species is a group of organisms that interbreed to produce fertile offspring. Selective breeding is when organisms are deliberately bred so their offspring have the desirable characteristics.

A Pitsky is a pit bull/Husky mix. While this mixed breed varies from dog to dog ... meaning that a Pitsky may chase small animals or make frequent escape attempts. Because of the stigma ...

In fact, the variation among breeds of dogs is far greater than the variation among other completely distinct species in the family Canidae. If dogs evolved from wolves, which seems to be the case ...