Samantha started having difficulty falling asleep during final exam week. Although exams are over, she now starts to worry about sleep right after dinner. Even the sight of her bed makes her very anxious. The fact that Samantha's insomnia continues long after the stress of exams is over points to the role of ________ in the maintenance of sleep disorders.
A. biology
B. other medical conditions
C. learning
D. unknown factors
Answer: C
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Among people aged 14 to 29, which ethnic group consistently has the highest self-esteem at all ages?
What will be an ideal response?
A farmer who allows only certain horses to breed with other certain horses is practicing
a. artificial selection. b. natural selection. c. evolutionary biology. d. biological selection. e. genetic cleansing.
Mr. Eli Shun wants to study the development of emotion in children for his doctoral dissertation. He would like to graduate as soon as possible, so he devises a study that consists of assessing children of different ages at the same time
This is an example of a ___________ research design. a. survey c. cross-sectional b. longitudinal d. cross-sequential
Which continents have the highest rates of low-birth-weight neonates?
a. North and South America b. Europe and Australia c. Asia and Africa d. Australia and North America