The mixing of the races is known as
A) mestizo
B) Columbian Exchange
C) ethnic classification
D) miscegenation
E) syncretism
D) miscegenation
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In which of the following environments do hemoglobin molecules show decreased oxygen affinity?
A) the more acidic environment of an active tissue B) the more basic environment of an active tissue C) the more acidic environment of a resting tissue D) the more basic environment of a resting tissue
Which condition is least important for wind to have a major effect on landscape?
A) parent rock type B) frequent strong winds C) sparse vegetation D) abundant loose-surface particles
Radon gas can accumulate in people's homes and pose a serious lung cancer risk. What is the source of the radon gas?
A. contaminated groundwater surrounding nuclear power plants B. byproduct from the breakdown foam insulation used in home construction C. byproduct from the breakdown of asphalt roofing shingles used in home construction D. radioactive decay of uranium minerals found in rocks and sediment E. breakdown of natural gas deposits
Anthropogenic sources of carbon dioxide levels in the atmosphere are
A. Easily determined with recent technological advances B. All offset by carbon storage in northern forests C. Measured with a great deal of precision D. Increasing at the rate of about 0.5 percent per year E. All of these are correct