Final answer:
Dr. Spaghetti's bacteria strain has a growth factor of 2, indicating exponential growth, with the population doubling every hour.
Step-by-step explanation:
Dr. Spaghetti is working with a strain of bacteria that doubles in size every hour. Starting with one bacterium and having two after one hour means the bacteria has a growth factor of 2. This is characteristic of exponential growth where the increase in the number of bacteria happens at a constant percentage rate per unit time. In the context of the problem, since the bacteria count increases from 1 to 2 over the span of an hour, the growth factor is 2. In theory, if this rate continues, after the second hour, there would be 4 bacteria, then 8 after the third hour, and so on, with the population doubling every hour. This understanding is pivotal in grasping concepts such as population dynamics and growth curves in various scientific and mathematical studies.