BOTANY

Detailed explanation-1: -Abyssinian centre: This region includes Ethiopia and parts of Somalia. The endemic species listed from this centre include Wheat, sorghum, bajra, safflower, castor, broad bean, okra, coffee etc. 5. Central Asian centre: This centre includes north-west India, Afghanistan, Uzbekistan and western China.

Detailed explanation-2: -The Levant is the ancient home of the ancestors of wheat, barley and peas, in which many of these villages were based. There is evidence of the cultivation of cereals in Syria approximately 9, 000 years ago. Wheat, barley, rye, oats and flaxseeds were all domesticated in the Fertile Crescent during the early Neolithic.

Detailed explanation-3: -Central Asiatic Center: Includes Northwest India (Punjab, Northwest Frontier Provinces and Kashmir), Afghanistan, Tadjikistan, Uzbekistan, and western Tian-Shan.

Detailed explanation-4: -The place where a species first originated is called its centre of origin. Evolution of species is a slow but continuous process. Some of the species in present day flora are quite old while a great majority of them are recent in origin. (ii) The natural selection of the hybrid and mutant populations.