African-American adolescents constitute ____ of the adolescent population in the United States, yet account for ____ of those arrested for violent crime
a. 10%? 25%
b. 25%? 12%
c. 8%? 30%
d. 13%? 50%
d
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Homing pigeons are said to be able to always find their way home based on their instincts. Which of the following concepts explains this?
A. mutations B. ethology C. ecology D. fixed action patterns
Regarding the reticular formation, which of the following statements is FALSE?
a. Destruction of the reticular formation causes constant wakefulness. b. The reticular formation lies inside the brainstem and medulla. c. The reticular formation is important in the control of attention and arousal. d. The reticular formation acts as a clearinghouse for incoming information, giving some messages priority while turning others aside.
The system of rules that governs how words or phrases are combined within a sentence is called:
a) syntax. b) semantics. c) morphology. d) phonology.
Which of the following statements about otitis media is true?
A) Plastic tubes that drain the Eustachian tubes often are used to treat chronic otitis media in children. B) Compared with children remaining at home, otitis media occurs less often in children who attend child-care centers. C) Only about 20 percent of U.S. children have experienced three or more bouts of otitis media. D) The incidence of otitis media is greatest between 3 and 5 years.