meaning of racial categories

DRIVING QUESTIONS
1. What contributes to human skin color, and why is there so much variation in skin color among different populations?
2. Where did the earliest humans evolve, and how do we know?
3. What can genetics and the fossil record tell us about human evolution?

 
"Our Prices Start at $11.99. As Our First Client, Use Coupon Code GET15 to claim 15% Discount This Month!!"