For several years, Ralph has experienced alternating episodes of very severe depression and milder episodes of mania. What is the most appropriate diagnosis?

During infancy, girls

A) are slightly taller than boys. B) are slightly heavier than boys. C) have a higher ratio of fat to muscle than boys. D) have less mature bones than boys.

Human males who have the same major histocompatibility complex as a female are rated by the female as having a more pleasant body odor

Indicate whether the statement is true or false