Why is there a growing concern that children are watching television commercials advertising unhealthy foods?
a. because of the international epidemic of obesity in children
b. because it makes it very difficult for parents to get children to eat their vegetables at dinner time
c. because these foods are generally much more expensive than healthy foods
d. because they are not as interested in watching the Veggie Tales show
Answer: A
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Which statement supports the proposition that the presence of an X chromosome appears to be necessary for life?
a. X-chromosomal genotypes are expressed as consistent phenotypes at a rate of around 85%, while Y-chromosomal genotypes are expressed as consistent phenotypes at a rate of only about 15%. b. The X chromosomes are expressed far earlier in the prenatal period than the Y chromosomes c. There are no chromosomal disorders wherein a person has only Y chromosomes. d. Most of the lethal chromosomal disorders, including Tay-Sachs disease and cystic fibrosis, are located on the Y chromosome.
Research with children who are at high risk for developing schizophrenia has found that an improvement in symptoms is most associated with ____
a. tough love b. caregivers' positive remarks c. structured discipline d. challenging irrational thoughts
Which type of reinforcement schedule has the HIGHEST rate of response?
A) variable-interval B) fixed-interval C) fixed-ratio D) variable-ratio
When can we NOT conduct a one-sample z test?
A. when we know the population mean B. when we do not know the population standard deviation C. when the population distribution is normal D. when we do not know the shape of the population distribution, and sample size is greater than 30