About what percentage of annual income is received by the richest 5 percent of American families?
a. 10 percent
b. 20 percent
c. 30 percent
d. 40 percent
ANSWER:
b
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Europeans immediately recognized that the monumental architecture such as earthen mounds in North America were made by indigenous peoples.
Answer the following statement true (T) or false (F)
In the 1800s, the small population of the island of Martha's Vineyard included many people who were congenitally deaf. Everyone there spoke sign language because so many people had deaf neighbors or relatives. They could trace this trait back to a few of the original settlers on the island, who were deaf and in the same family. What is the most likely explanation, in evolutionary terms, why so many people on the island were deaf?
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a. theological b. biological c. cultural d. geographical e. national