The concentration of psa (prostate-specific antigen) in the blood is sometimes used as a screening test for possible prostate cancer in men. the value is normally reported as the number of nanograms of psa per milliliter of blood. a psa of 1.6 ng/ml is considered low. express that value in terms of the units shown.

Cancer of the prostate is one of the most common types of cancer among American men. More than 6 in 10 cases of prostate cancer cases occur in men 65 and older. Treatment for prostate cancer works best when the disease is found early.

Explanation:

explanation:

the fossil record extends back to a dog-like ancestor some 55 million years ago, which gave rise to the first horse-like species 55 to 42 million years ago in the genus eohippus.