A region of the canary forebrain shrinks during the nonbreeding season and enlarges when breeding season begins. This change is probably associated with the annual ________.
A. addition of new syllables to a canary’s song repertoire
B. crystallization of subsong into adult songs
C. renewal of mating and nest-building behaviors
D. elimination of the memorized template for songs sung the previous year
Answer:A
A region of the canary forebrain shrinks during the nonbreeding season and enlarges when breeding season begins. This change is probably associated with the annual ________.
A. addition of new syllables to a canary’s song repertoire B. crystallization of subsong into adult songs C. renewal of mating and nest-building behaviors D. elimination of the memorized template for songs sung the previous year