The Finding That Zenk Activity Increased in Song Sparrows Whose

Multiple Choice

The finding that zenk activity increased in song sparrows whose territorial boundaries had been challenged suggests that

A) genes have much less to do with the production of behavior patterns than we believed to be the case 25 years ago.
B) the environment can continuously alter gene activity and, therefore, modify an organism's behavior.
C) while the environment influences when a gene becomes active, once that has happened, environment plays little role in further repetitions of the behavior.
D) All of the above are true.