____ is produced from the leaves of the coca plant.
A. heroin
B. caffeine
C. cocaine
D. opium
Answer: C
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If a child's mental age is lower than the child's chronological age, then the child's IQ:
A) is less than 100 B) is greater than 100 C) is exactly 100 D) cannot be determined from the information provided
Which of the following is true of experimental studies?
A. They involve manipulation of independent variables. B. They cannot be used to draw causal conclusions. C. They can be conducted in any situation without ethical concerns. D. They can only examine associations between variables.
Which of the following teenagers is least likely to engage in early sexual activity?
a. Tammy, whose parents are less restrictive b. Connie, whose parents are overly restrictive c. Mike, who comes from a religious family d. Joey, who engages in other risk-taking behaviors
What does the research say regarding parental behavior towards preterm infants?
a. Parents tend to interact with preterm infants less and respond with less sensitivity. b. Parents tend to respond to them in a highly sensitive way and interact with them frequently. c. Parental behavior depends upon the sex of the child. d. There is no consistency in the research on this issue.