3. Salts and sugars work to preserve foods by creating a (A) depletion of nutrients (B) hypotonic environment (C) lower osmotic pressure (D) hypertonic environment.

4. Which of the following is an advantage of the standard plate count? (A) can readily count cells that form aggregates (B) determines the number of viable cells (C) can be performed on very dilute samples, such as lake water (D) provides immediate results