The cumulative effective dose limit for an occupational exposure to ionizing radiation is ____ mrem.

Hugh-Leifson oxidation-fermentation (OF) medium differs from carbohydrate medium used to identify Enterobacteriaceae by all of the following characteristics except

A) there is a lower concentration of protein present in OF medium. B) brom thymol blue is used as the pH indicator. C) a control tube is not required for OF medium. D) there is a higher percentage of carbohydrate present in OF medium.

At birth, the lungs are ________, but as adulthood approaches, the lungs turn a dark slate gray.

A. bluish B. reddish C. pinkish D. greenish