Which of the following statements about studies of songbirds is true?
A) The brains of male and female songbirds are similar in the nonbreeding season.
B) New neurons are not produced in the brains of adult vertebrates.
C) In male songbirds, testosterone affects only the brain.
D) Testosterone causes the song-learning portions of the male songbird's brain to shrink.
E) None of the above

Question

Quizplus · Accepted Answer

Studies have shown that the brains of male and female songbirds are similar in the nonbreeding season. However, during the breeding season, the brain regions involved in song production and control show significant sex differences in size and structure.

Which of the Following Statements About Studies of Songbirds Is