A population of bacteria reproduces exponentially, has a geometric growth rates of 2.0, and an initial population size of 1. If this species of bacteria reproduces every 30 minutes how many bacteria will there be 5 hours from now ?
Since the bacteria reproduces every 30 minutes, there are 60 minutes in an hour, so 5 hours is 5 * 60 = <<5*60=300>>300 minutes.
The geometric growth rate of 2.0 means that the population doubles every time it reproduces, so after 5 hours, the population will have doubled 300 / 30 = <<300/30=10>>10 times.
Starting with an initial population size of 1, the population will be 1 * 2^10 = 1 * 1024 = <<1*1024=1024>>1024 bacteria after 5 hours. Answer: \boxed{1024}.