Why should you remove your apron when going to the bathroom?

What causes fermentation a. antibodies b. antigens c. microorganisms d. antibiotics

Which two levels of the spine that can undergo flexion and extension?

*edit* i took the test and i picked a and it was incorrect for its c! rank the following suggestions for preventing std, in order of increasing effectiveness. 1) using latex condoms properly 2) using spermicidal foam or jelly with a monogamous partner 3) abstaining from sexual intercourse and genital contact a. 1, 2, 3c. 2, 1, 3