The effect that experience has on the brain depends on the ________ of the individual

As a result of his experiments with roosters, Berthold concluded that

A) the testes secrete testosterone. B) the testes release a masculinizing chemical into the blood. C) hormones are important for homeostasis. D) castration has different effects in birds than in mammals.

When the behavior of one or more study participants is measured as they age, this is called ________ research

a) longitudinal b) developmental c) cross-sectional d) sequential