Of the psychological characteristics examined for their genetic basis, probably the most studied has been personality

The order of the meningeal layers from the surface of the brain outward are

a. dura, pia, arachnoid. b. arachnoid, dura, pia. c. pia, dura, arachnoid. d. pia, arachnoid, dura. e. dura, arachnoid, pia.

In general, one could accurately say that humans have evolved to ____

a. be selfish rather than to care about other people b. care about their families more than they care about themselves c. care about their large social networks just as much as they care about their families d. care about themselves more than others—though only in life-or-death situations