History of the domestic sheep exact line of descent between domestic sheep and their wild ancestors is unclear. The most common hypothesis states that "Ovis aries" is descended from the Asiatic ("O. orientalis") species of mouflon. A few breeds of sheep, such as the Castlemilk Moorit from Scotland, were formed through crossbreeding with wild European mouflon. The urial ("O. vignei") was once thought to have been a forebear of domestic sheep, as they occasionally interbreed with mouflon in the Iranian part of their range. However, the urial, argali ("O. ammon"), and snow sheep ("O. nivicola") have a different number of chromosomes than other Ovis species,
Domesticated plants of Mesoamerica known as tree spinach. Cultivated from Arizona to Costa Rica. Also gathered from the wild in hot, arid, and semi-arid climates note: the tobacco plant was cultivated throughout Central America, the Caribbean and North America. Domesticated plants of Mesoamerica Domesticated plants of Mesoamerica, established by agricultural developments and practices over several thousand years of pre-Columbian history, include "maize" and "capsicum". A list of Mesoamerican cultivars and staples: Maize was domesticated in Western Mexico and Mesoamerican cultures expanded wherever it was cultivated. It became widespread in the Late Archaic Period and was grown wherever conditions allowed. The early use of maize