A common factor found in persons with AIDS is
a. immune system dysfunction
b. dementia
c. pneumocystis carinii pneumonia
d. hemophilia
e. Kaposi's sarcoma
A
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According to Darwin, there is a struggle for survival because _____.
a. there are individual differences among members of a species b. there are many more offspring than can survive in a given environment c. animals of any species are hardwired to try to kill one another to survive d. humans must decide which animals survive and which ones do not
When a drug tolerance develops, an individual:
a. requires smaller amounts of the drug to produce the same physical and behavioral effects b. will show an allergic reaction each time the drug is administered c. will experience sweating and changes in heart rate when the drug is no longer available d. requires increased amounts of the drug to produce the same physical and behavioral effects
Avoidance learning appears to involve both
a. classical and operant conditioning. b. place and latent learning. c. shaping and response chaining. d. fixed and variable ratio schedules.
A simple consideration of the number of people married and the number divorced in a given year typically leads to the conclusion that about ____ of all marriages end in divorce; however the actual percentage is about ____
a. half; 55% b. half; 40% c. half; 30% d. two-thirds, 50%