Mutations caused by human-made substances or activities are:
A. spontaneous mutations
B. induced mutations
C. of no evolutionary significance
D. all of these
B. induced mutations
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During cell division, the DNA exists __________
a. as chromosomes b. in its chromatin state c. outside the cell d. as RNA
A "big man" is associated with a tribal form of political organization
a. True b. False Indicate whether the statement is true or false
Which of the following statements is true?
a. A society cannot exceed the carrying capacity of its environment. b. A society cannot easily increase food production far beyond their carrying capacity. c. A society can easily exceed its carrying capacity. d. No environment has a fixed carrying capacity. e. Societies usually stay far below their carrying capacities.
Regarding sexual orientation, all of the following are true EXCEPT that
A. within a society, individuals will differ in the nature, range, and intensity of sexual interests and urges. B. flexibility in sexual expression seems to be an aspect of our primate heritage, since both masturbation and same-sex sexual activity exist among chimpanzees and other primates. C. culture always plays a role in molding individual sexual urges toward a collective norm, and these norms vary from culture to culture. D. there is conclusive scientific evidence that sexual orientation is genetically determined. E. different types of sexual desires and experiences hold different meanings for individuals and groups.