What is the main reason that humans probably do not have a "death instinct" as Freud postulated?
A) Human beings don't kill themselves in large numbers.
B) Human beings don't kill other people in most societies.
C) A drive toward death would not have survived natural selection.
D) All of Freud's theories have been proven wrong by empirical research.
Answer: C
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In DeWall and Bushman's (2009) study of the impact on aggression of heat- or cold-related words, participants exposed to ________ words showed more ________.
A) cold-related; aggressive word completions. B) heat-related; non-aggressive word completions. C) cold-related; hostile attributions to others behaviour. D) heat-related; hostile attributions to others behaviour. E) heat-related; non-hostile attributions to others behaviour.
When describing her last prenatal visit, Yang says, "They basically inserted a tube into my uterus via my vagina and took a tissue sample from the sack surrounding my fetus.". Given this description, Yang appears to have undergone
a. maternal blood sampling. b. preimplantation genetic diagnosis. c. amniocentesis. d. chorionic villus sampling.