Enzymes exist in all raw food. All raw foods, including meats, have some enzyme activity. For example, green bananas have amylase, an enzyme that breaks down starch to glucose. In a number of days, the amylase converts the raw starch of the banana to sugar, which is why darkened bananas are so much sweeter tasting.
The Bantu expansion. The Bantu are thought to have originated from the the area of Nigeria/Cameroon, and started their expansion East and South about 5,000 years ago (3,000 BC). They reached the equatorial rain forest 3500 years ago, entering what is now Uganda, 3000 years ago.he Bantu are thought to have originated from the the area of Nigeria/Cameroon, and started their expansion East and South about 5,000 years ago (3,000 BC).
In the long term, Bantu dominance has made the Bantu language family the most spoken in Africa. Most often, A Bantu language is the official language in an African country. Other languages are often considered inferior. Lesson Summary. In about 1500 B.C.E., a group of Bantu language speakers discovered that they could domesticate yams and bananas.