Stress-induced depression has been found to be a result of which of the following?
A. Weakened immune response
B. DNA methylation of a nerve growth factor gene
C. Hormonal changes
D. Seasonal changes
E. Exposure to blue light
Answer: B
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Heritability can only be measured for
A) traits with phenotypic variance. B) traits with genotypic variance. C) discrete traits. D) polygenic traits. E) None of these
The human population on Earth is expected to reach 9.7 billion people by
A) 2015. B) 2050. C) 2093. D) 3150.
During muscle contraction, the heads of myosin filaments pull actin filaments toward the center of a ________ (the contractile unit of muscle)
Fill in the blank(s) with correct word
Which of the following is false regarding water's specific heat?
A) The specific heat of water is 1.0 calorie per gram. B) Heat applied to water must initially break a number of hydrogen bonds. C) Water's high specific heat has a temperature-buffering effect. D) Water gains and loses heat more slowly than most other solvents do. E) The specific heat of water is similar to most liquids.