Twin studies allow researchers to assess hereditary influences, in part, because
A) ?genetic overlap for fraternal twins is greater than for non-twin siblings.
B) ?twins are usually motivated to act similarly.
C) ?genetic overlap is 100% for identical twins and 50% for fraternal twins.
D) ?environmental influences are eliminated in twin studies.
C
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Jared plans to gather donations for revitalizing the city park. If he wanted to use the foot-in-the-door technique for obtaining compliance, Jared will ____
a. ?gather the donations, then utilize them for building a new skate park instead b. ?ask people to donate $25.00 when he only wants them to donate about $5.00 c. ?have people pledge to donate money, then reveal that they also agreed to volunteer for 10 hours d. ?get people to sign a petition, then come back later to request donations for trees and flowers
Major changes in personal behavior can occur when attitudes are held
a. as a result of social facilitation. b. with a passionate conviction. c. as a result of a long-standing habit. d. due to immediate consequences.
Boris has been under a great deal of stress. Which of the following is most likely true?
a. His immune system is weakened. b. His immune system is strengthened. c. His immune system is unaffected. d. His immune system has become part of the respiratory system.
Because radiation can have damaging effects during the prenatal period, pregnant women are usually cautioned to avoid:
a. fish from the oceans off Japan b. x-rays that are not essential c. eating from glazed pottery dishes d. swimming in polluted lakes and rivers