refers to the change in total revenue that results from producing and marketing one additional unit of the product
Dolly is the name of a sheep that has the honor of being the first mammal to be cloned by a group of scientists in England. Dolly was born July 5th, 1997 and she passed away in 2003. She lived for 6 and a half years, as a normal, active ewe.
An adult female sheep is referred to as a ewe (/juË/), an intact male as a ram or occasionally a tup, a castrated male as a wether, and a younger sheep as a lamb. Sheep are most likely descended from the wild mouflon of Europe and Asia.