________ is one experimental technology used to develop drugs to shut off disease-causing genes.

The "clothesline" or "hangman" injury is a common injury from riding:

a. all-terrain vehicles b. personal watercraft c. motorcycles d. snowmobiles

Data on sport participation patterns among African Americans indicates that they

A. have not experienced racial segregation in sports since the Civil War. B. make up nearly eighty percent of all professional athletes in the U.S. C. have always received better media press coverage than white athletes. D. remain underrepresented in most pro and amateur sports.