Homosexual or same-sex orientation
A) has heritability estimates of approximately 95%.
B) appears to be at least in part genetically determined.
C) has heritability estimates of less than 1%.
D) does not appear to have a genetic basis.
B
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Why do many biologists and psychologists consider altruistic behavior a theoretical problem? a. Altruism benefits someone else more than the person doing the act
b. So far, researchers have not located the gene responsible for altruistic behavior. c. Most people engaging in an altruistic act do not feel good about it. d. Altruistic acts are more common toward nonrelatives than toward relatives.
The customs and social norms used to regulate the display of emotions are known as
a. gender roles b. cognitions c. behavioral expressions d. display rules e. fureai
Which of the following is the best definition of sexual orientation?
A) a person's sex as determined by his or her genes B) a categorization based on the gender of a person's sexual partners C) a consistent preference for sexual relations with members of the same sex, opposite sex, or both D) a categorization based on whether a person's behavior matches their biological sex or not
_____ occurs when people require larger amounts of a drug to experience the same effects experienced during their initial usage
A) Physical withdrawal B) Psychological withdrawal C) Satiety D) Tolerance