The percentage of the human population lost to war today has decreased since the time of the huntergatherers. One possible reason is that between-group violence has been reduced by ____.
a. increasing economic dependencies among nations
b. evolutionary genetic changes
c. lower testosterone levels among males
d. changes in child-rearing practices and values
Question 2
Children and youth are exposed to increasingly violent and graphic images and ideas through films, video games, and music lyrics. Some research results show correlations between media exposure and aggression, which indicates that ____.
a. visual imagery causes more aggression than music lyrics
b. media exposure causes aggression
c. there may or may not be some relationship between the two
d. aggressive children and youth choose to watch and listen to violent media
Anterior view of the human skeleton.
Population Pyramids
The four routes of entry into the human body for hazardous materials.
Physics: Power, Energy and Time
A human pedigree of the X-linked color-blindness trait
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