Which of the following units represents the addition of fluoride in drinking water?
a. milligrams (mg)
b. milliliters (ml)
c. parts per million (ppm)
d. liters (L)
c. Fluoride can be added to water (in ratios or parts per million [ppm]), dentifrices, mouthwashes, gels, or tablets as a supplement for ingestion.
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Major League Baseball teams have signed many Central and Latin Americans to contracts because these players
A. constitute a large pool of relatively cheap and skilled labor. B. are not afraid to fail and return to the native countries. C. are more disciplined that players raised in North America. D. have fewer adjustment problems than most U.S. players.
The ________ division of the autonomic nervous system prepares organs for stressful or emergency situations.
Fill in the blank(s) with the appropriate word(s).
What classification of disability describes an individual who may work in an upright or walking position as long as no greater than minimal effort is required?
A. precluding heavy work B. limitation to light work C. precluding heavy lifting D. precluding very heavy lifting
Besides chromosomes and genes, the other biological factor that may determine whether one is attracted to the members of the opposite, or one's own, sex is:
A. whether the mother ate meat during pregnancy. B. early childhood experiences. C. whether the mother smoked or drank during pregnancy. D. whether the child was raised by lesbian or gay parents. E. exposure to sex hormones during gestation as a fetus.