The flocking of birds is more closely related to which concept?

Which of the following statements is TRUE?

a. "sex" and "gender" refer to the same thing b. "sex" and "gender" are both dichotomous classifications c. "sex" refers to biological characteristics, whereas "gender" is the social construction of femininity and masculinity d. both "sex" and "gender" are biological constructs

Masters and Johnson's early work scientifically described

A) male reproductive anatomy. B) the human sexual response. C) female reproductive anatomy. D) the flirting behavior of adults.