Directional selection can be distinguished from disruptive selection by
a.
the elimination of extreme variations of traits
b.
selection for two extreme variations of a trait
c.
the preservation of gene frequencies
d.
selection for one extreme variation of a trait

the answer to your question is slate

what statement best describes the difference between the sympathetic and parasympathetic nervous systems?

the sympathetic nervous system prepares the body for intense physical activity and is often referred to as the fight-or-flight response. the parasympathetic nervous system has almost the exact opposite effect and relaxes the body and inhibits or slows many high energy functions.