What does the out of Africa theory maintain? Cro-Magnon man replaced Neanderthals who had originated in Africa remains of hominids and early humans have only been found in Africa civilizations started in Africa and spread to other parts of the world modern humans originated in Africa and migrated to other parts of the world

modern humans originated in Africa and migrated to other parts of the world.

Explanation:

The proposition "Out of Africa" is an evolutionary theory which explains that modern human has been originated from Africa about 100,000–200,000 years ago and then have migrated to different parts of the world following the late Pleistocene. The advancement of genetic analytics techniques in the 1980s exposed scientists to the hypothesis named out of Africa. The model emphasizes that while the world once inhabited by different human-like creatures, only one has evolved into modern man.

Checks and Balances system
Separation of Powers in the United States is associated with the Checks and Balances system. The Checks and Balances system provides each branch of government with individual powers to check the other branches and prevent any one branch from becoming too powerful.