The perspective focuses on directly observable actions that people perform

A trait within an organism that is present but not expressed is called the ___________ trait

a. dizygotic c. dominant b. monozygotic d. recessive

In the Tuskegee syphilis study

a. participants were informed of the nature of their disease b. participants were treated with penicillin when it became available in the mid-1940s c. participants included African-American farmers in Alabama at different economic levels d. while treatments were initially suspended when results were unimpressive, study of the progress of the disease continued until participants died e. the study itself was halted before it was exposed by the press (p, 123)