A theory is
a. a basis for further investigation.
b. an unproven proposition.
c. an educated opinion.
d. a statement about how things are related.
e. a hunch about how things are related.
ANS: D
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Studies of Andean, Tibetan, and Ethiopian populations have demonstrated that _________
a. there is a universal human response to living at high altitude b. living at high altitude results in negligible anatomical changes c. humans cannot adapt to living at high altitudes d. there is no single mechanism in which humans adapt to high altitude
The term Homo ergaster
a. was suggested to be used to refer to African Homo erectus specimens b. was suggested to be used to refer to Asian Homo erectus specimens c. is fully accepted by all paleoanthropologists d. was initially proposed by Eugene Dubois e. refers to later H. erectus specimens
What has happened to the disparity in infant mortality between African Americans and European Americans in recent years?
A) The disparity between the two groups has widened. B) Infant mortality is now higher in European Americans than in African Americans. C) The disparity between the two groups has narrowed a little bit. D) The two groups have relatively equal infant mortality rates today.
Globally, the vast majority of adults cannot digest:
a. peanuts b. milk c. fava beans d. sugars