Thomas is asked to respond to a series of statements, such as "I believe that other people need and depend on me." Generalizing from research described in the text, this questionnaire is most likely measuring:

A nutritional deficiency caused by inadequate intake of calories, protein, vitamins, or minerals is called ________

Fill in the blank with the appropriate word.

There is evidence that _________ explains the effect of genetic relatedness on altruism

a. similar upbringing. b. parental directives. c. emotional closeness. d. all of these answers are correct