________ Acne vulgaris, or simply acne, is a common skin condition that occurs when oil and dead skin cells clog the skin's pores

All of the following are sources of complex carbohydrates (starches) EXCEPT _______

a. vegetables b. natural sugar in fruits and vegetables c. citrus fruits d. whole grains

When venous blood is withdrawn, it is placed in a tube that is ________ at a very high speed

A) dialyzed B) cultured C) centrifuged D) stress tested