Sex Differences in the Size of Brain Nuclei That Control

Multiple Choice

Sex differences in the size of brain nuclei that control song are established in zebra finch (Taeniopygia guttata) as a result of the hormonal environment that exists soon after hatching. This illustrates best the way in which hormones influence behavior by means of their effect on

A) muscles and motor neurons.
B) changes in social preference.
C) sensory or perceptual mechanisms.
D) the central nervous system.