Final answer:
With the right growing conditions, bacteria can double in number every 30 minutes.
Step-by-step explanation:
In bacteria, the time it takes for the population to double is called the doubling time.
Based on the information given, we know that the number of cells in bacteria after 90 minutes is 32. To find the doubling time, we can set up an equation:
Initial number of cells x 2^(time/doubling time) = Final number of cells
Using the given information, we can substitute the values:
1 x 2^(90/doubling time) = 32
Solving for the doubling time, we find that it is 30 minutes. Therefore, the answer is B) 30 minutes.