________ are changes in the DNA molecules of which genes and chromosomes are made and are the most important source of variety on which natural selection operates.
A. Genotypes
B. Alleles
C. Clines
D. Balanced polymorphisms
E. Mutations
Answer: E
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About __________ people live on the Hopi reservation
A) 500 B) 7,000 C) 25,000 D) 50,000
What does research suggest goes a long way toward lessening incidents of family violence?
A) the sharing of childrearing responsibilities B) a traditional division of labor C) an increase in family income D) presence of an extended family
How is Çatalhöyük unlike the early cities?
What will be an ideal response?
A critical problem faced by the Na is:
a. Dealing with a culturally powerful Chinese government that disapproves of Na practices. b. Continual food shortages. c. The fact that children rarely know who their parents really are. d. The fact that their marriage system is unnatural and therefore difficult to sustain. e. Constant conflict between fathers who want rights to their children and mothers who deny fathers such rights.