What do scientists believe is the determining factor that causes skin color variations in groups of humans around the world?
a.
genetics – two people with the same skin color are more likely to be genetically related, even if they come from different parts of the world
b.
diet
c.
ultraviolet radiation exposure in a society over a long period of time
d.
vitamin deficiencies

What is the difference between the cultures of central asia and the caucasus region? the majority of people in central asia are muslim; the majority in the caucasus region are christian. the primary language in central asia is armenian; the primary language in the caucasus region is russian. central asia has been plagued by ethnic unrest; the caucasus region has had little ethnic conflict. the effects of soviet rule can still be seen in central asia; the caucasus region has developed its own identity since the fall of the ussr.