Why does exogamy, the practice of seeking a husband or wife outside one’s own kin
group, have adaptive value outside of biological concerns?
A. It increases the likelihood that disadvantageous alleles will find phenotypic
expression and thus be eliminated from the population.
B. Exogamy creates new social ties and alliances, providing access to more resources
and social networks.
C. It impedes peaceful relations among social groups and therefore promotes population
expansion.
D. It was an important causal factor in the origin of social stratification.
E. Exogamy is not adaptive; it is just a culture construction.
The greenhouse effect is a natural phenomenon that keeps the earth’s surface warm.
Without greenhouse gaseswater vapor, carbon dioxide, methane, nitrous oxide,
halocarbons, and ozonelife as we know it wouldn”t exist. The current problem is that
A. there are more cooling than warming radiative forcings.
B. the atmospheric concentration of greenhouse gases has reached its highest level in
400,000 years, and this rise has upset the balance of radiative forcings working to warm
and cool the earth.
C. scientists cannot agree on a general model of how the greenhouse effect went from
being a positive to a negative and a life-threatening force.
D. global warming actually benefits 90 percent of the world population, so it is difficult
to mobilize the will to address the anthropogenic causes of climate change.
E. it is difficult to distinguish between climate change and global warming.