Which best describes adaptation among humans?
a. a process of cultural adaptation over time
b. a process of biological and cultural adjustment over time
c. a process of physiological adjustments over time
d. a process of migration and learning over time
b
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What is the main source of income for the Tlingit Indians of Alaska and Canada?
a. Hunting b. Tourism c. Social services d. Farming e. Guide services
Common ancestry isn't the only reason for similarities between species. Similar traits can also arise if species experience similar selective forces and adapt to them in similar ways. This process is known as
A. convergent evolution. B. homology. C. genetic evolution. D. gene flow. E. molecular convergence.
Groups of labor migrants in new countries may eventually be a source of which of the following?
a. political instability b. poverty c. homogenization d. ethnogenesis
There is extremely little social mobility in a class society
a. True b. False