Your investigation of two different languages reveals that their basic vocabularies differ by 28 percent. Using Glottochronology, you determine that some historical event caused the groups speaking these languages to separate:
a. 500 years ago.
b. 1000 years ago.
c. 1500 years ago.
d. 2000 years ago.
e. Insufficient information to answer question.
B
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The occurrence of new cases of a disease is calculated as the __________
a. prevalence rate b. crude death rate c. mortality rate d. incidence rate
A study of the garbage that people throw away may reveal more about their lifestyles than surveys and interviews because __________
A. garbage is easier to analyze than survey data B. people may not accurately report their behaviors C. fieldwork in garbage dumps is less expensive D. surveys and interviews are done by sociologists
We should not view contemporary foragers as isolated or pristine survivors of the Stone Age. Why? What is the evidence to suggest this view?
What will be an ideal response?
Sahelanthropus tchadensis, or Toumai,
A. may be the oldest possible human ancestor yet found. B. may be the oldest possible "missing link" between gorillas and Orrorin tugenensis. C. apparently lived in a habitat with scarce animal life and mountain terrain. D. moves scientists close to the time when humans and apes in the Americas diverged from a common ancestor. E. looks more like a chimp than a human, specifically because of the placement of its foramen magnum at the base of its skull, which is farther back than in later hominins.