When constructing a distribution of the number of people who obtained each score on a test, you should use:
a. a frequency polygon.
b. a bar graph.
c. a line graph.
d. either a frequency polygon or a bar graph.
D
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What is the effect of MPTP?
A. It kills the neurons that release dopamine. B. It suppresses activity of the immune system. C. It is converted in the brain to dopamine. D. It inhibits the enzyme acetylcholinesterase.
Why will every industrialized nation in the world face a demographic crisis in the near future?
A) The social security systems in these countries will be bankrupt. B) The number of young adults will far outnumber the elderly. C) There will be fewer young and middle-aged workers to provide for the financial well-being of the elderly. D) The current generation is not adequately planning for retirement.
The hair cells of the cochlea are embedded in the rubbery _______________
a. oval window b. basilar membrane c. auditory nerve d. semicircular canals
In the United States today, about what percent of 40-year-olds have been married and divorced?
a. about 10% b. about 20% c. about 33% d. about 50%