What was the chief reason for migration of peoples in North Africa to go east and south to resettle?
a. Invasion by Egyptians.
b. Warfare among tribes in the the Sahalian kingdoms.
c. Egyptians dammed the Nile river and made settled agriculture impossible.
d. Drying up of the Saharan grasslands.
e. Trade connections with the Indian ocean network.
Question 2
Recent archeological and anthropological discoveries have shown that
a. Africans took over the Arabian Peninsula before 1,000 B.C.E.
b. African societies were much more involved in worldwide developments of human history than had previously been believed.
c. the process of state-building was more advanced in sub-Sahara Africa than it was in ancient India, China and Mesopotamia.
d. farming and kingship were concepts brought into Africa from Mesopotamia.
e. Africa was totally isolated from the rest of the world until the tenth century C.E.
Tree species richness in North America is correlated with evapotranspiration rate.
DNA-based migration routes of Homo sapiens
Male South American Knob-billed Duck (S. m. sylvicola)
The magnetic field of Uranus as observed by Voyager 2 in 1986. S and N are magnetic south and north
Southwest Asia and North Africa
Sodium’s chief role is regulation of fluid balance