As a Result of the Hormonal and Neuroanatomical Differences Between

Multiple Choice

As a result of the hormonal and neuroanatomical differences between the male and female brains of zebra finches, ____.

A) only males sing their species' songs
B) only females sing their species' songs
C) males sing their species' songs at earlier ages than females
D) females sing their species' songs at earlier ages than males
E) females only sing their species' songs later in their lives