The highest score in a distribution minus the lowest score in a distribution is called the
a. standard deviation.
b. range.
c. variance.
d. mode.
b. range.
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As more genes are involved in determining a trait, what happens to the distribution of the trait in the general population?
a. It occurs more often in each generation. b. It occurs less frequently with each generation. c. The trait tends to be distributed in a bimodal manner. d. The trait tends to be distributed as a normal distribution.
Hamilton's breakthrough in explaining altruism from a biological perspective
a. rested on his taking into account the viewpoint of the genotype rather than that of the organism. b. involved the argument that natural selection favors personal fitness. c. is based on the idea that altruistic acts are just as often aimed at friends and acquaintances as they are at relatives. d. rests on the principle of reciprocation. e. is based on the argument that altruists will have greater reproductive success.
Which of the following brain mechanisms have been implicated in anorexia?
a) Starvation releases natural pain-reducing opioids producing a high, which reinforces not eating. b) With puberty, female hormones increase dramatically and damage centers which control eating in the thalamus and pituitary. c) Excessive exercise depletes the brain of neurotransmitters utilized by areas that regulate hunger or satiation. d) Stress-released hormones reduce the sensitivity of receptors that detect blood-sugar levels and release hormones that induce hunger.
Fowler and Dekle (1991) asked participants to feel a mouth saying one set of syllables at the same time that they listened to a soundtrack playing another set. Fowler and Dekle found that participants ______.
A. could either comprehend the syllables they were feeling or those they were hearing, but not both B. heard the syllables that they were feeling instead of what the soundtrack actually played C. could not comprehend either the syllables they were feeling or those that they were hearing D. heard the syllables being played by the soundtrack and failed to comprehend those they were feeling