Solutions For 9780131905429 Chapter 1.4 Problem 4AD

At the lowest temperature that is at 5⁰C, the bacteria show minimal growth, because they cannot reproduce very well at that temperature. They are almost static or just viable but not dead.

The adjoining graph shows bacterial growth rate at different temperatures.

In the second case there is a little growth, which shows this temperature, which is 10⁰ C is better than the freezing 5⁰C, thus there is a little more growth at the end of the 3^rd day. In the last case, the temperature 15⁰C is more favorable than the previous two temperatures, thus there is optimum growth among the three.