Sharing information through body language, tone of voice, and facial expressions is an example of ______.
A. universality hypothesis
B. facial leakage
C. nonverbal communications
D. Duchenne smile
Answer: C
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Which of the following is the most accurate statement about gray hair?
a. In many cases, the pigments that cause gray hair are actually toxic to the human body, which is why dying gray hair can actually b. Gray hair is something that all people will inevitably experience, starting at an average of 25 years of age. c. Hair doesn't "turn" gray, but rather stays gray when the natural pigments in hair follicles stop being produced. d. Most people view the graying of hair as a very negative event that signals the end of youth, vitality, and productivity.
It might seem contradictory at first that comprehensive sex-education programs are more effective than abstinence-only programs at delaying the age at which teens become sexually active. One reason might be that _____
a. comprehensive programs have a stronger message about abstinence b. comprehensive programs include access to condoms c. comprehensive programs teach sexual health skills, such as how to refuse unwanted sex and how to avoid risky sexual behavior d. comprehensive programs get teens on birth control
Professor Golder is studying hyperactivity in preschool age children
She is concerned that differences in child rearing, diet, and so forth may affect her results. To minimize these potential preexisting variables, she should be sure to do which of the following? A) Use random assignment when forming her groups. B) Include an independent variable. C) Include a dependent variable. D) Assign boys to the experimental group and girls to the control group.
Which of the following blood-forming cells produces platelets?
A. megakaryocytes B. myeloblasts C. lymphoblasts D. erythroblasts