Answer to Question 1
There is an arbitrary selection of traits used to define races, an inability to describe intra-species variation through racial categories, and repeated independent evolution of so-called racial traits in a population with no genetic relationship.
Answer to Question 2
While ethnocentrism is the belief that our own way of life is superior, cultural relativism helps us to understand the logic other cultures; it increases our understanding of others and is a fundamental anthropological research tool.
Schematic map of the human mitochondrial genome.
Organ systems of the human body.
The four routes of entry into the human body for hazardous materials.
How to solve application problems containing quadratics (Question 2)
The human brain
Human Trinucleotide Repeat Disorders