Archaeological sites in Australia have been dated to __________ years ago
a. ?30,000
b. ?25,000
c. ?100,000
d. 55,000
e. ?75,000
d
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Given the case studies presented in Chapter 12, global warming
a. will have a major effect on subsistence patterns. b. is cause for concern of anthropologists. c. will affect availability of fresh water on many communities. d. has several yet unknown effects on global communities. e. all of these.
A polytypic species
a. is one that has no phenotypic variability. b. has never been observed in nature. c. is one composed of local populations that differ from one another with regard to the expression of NO MORE THAN three traits. d. is one composed of local populations that differ from one another with regard to the expression of ONE OR MORE traits. e. is the result of inbreeding.
A perfectly competitive firm is producing the profit-maximizing output level when their variable cost increases. If the market price does not change, to maximize profit, the firm will need to ________.
A) increase production B) increase production by the amount of the variable cost increase C) decrease production D) maintain the current output level
Cultural processes complicate studies of biological adaptation
a. True b. False Indicate whether the statement is true or false