Melanin is produced by cells known as __________
A. melanomas
B. melanocytes
C. mitochondria
D. carotenes
Answer: B
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An increase in the demand for bananas will ________ the equilibrium price and ________ the equilibrium quantity of bananas.
A) decrease; increase B) increase; increase C) decrease; decrease D) increase; decrease
The majority of Neandertal fossils have been found in
a. South America. b. Asia. c. India. d. Africa. e. Europe.
Recall the mechanisms of genetic evolution discussed in the previous chapter. What is the relationship between gene flow and the existence of clines between human populations?
A. Gene flow increases the genetic isolation of neighboring groups, resulting in discrete genetic differences in the population, instead of clines. B. There is no relationship between gene flow and clines. C. Gene flow, the exchange of genetic material across populations, results in clines, which are gradual shifts in gene frequencies between neighboring groups. D. Clines accelerate gene flow and genetic change due to chance. E. Gene flow causes abrupt differences in gene frequencies between neighboring groups.
All of the following are considered nontraditional families except:
a. blended families b. single-parent households c. extended families d. cohabitation households