The epidemiological measurement of rate equals __________
a. population at risk/events
b. events/population at midyear
c. events/population at risk
d. crude death rate/ events
Answer c
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Among the Toda of South India, there tends to be:
A) fraternal polyandry. B) maternal polyandry. C) fraternal polygyny. D) maternal polygyny. E) monogamy.
Global warming is thought to be primarily caused by:
a. climate shifts. b. tilting of the Earth. c. loss of ozone. d. burning fields. e. burning fossil fuels.
H. J. Muller won the Nobel Prize in 1946 for his research
A) on human blood groups B) on chemical mutations in gold fish C) mapping the double-helix structure of DNA D) X-ray -induced mutations in fruit flies E) mapping the genes of the fruit flies
During the Middle Oligocene, ancestral ceboid monkeys could have traveled from Africa to South America because:
A. at that time, the two continents were connected B. a major lowering of sea levels facilitated crossing on natural rafts C. an ice age created a connecting sheet of ice D. none of these as the Atlantic Ocean presented an impossible barrier, as it does today