The most accurate statement regarding bacteria reproduction is:
"When conditions are ideal, bacteria can reproduce by fission at very high rates in a short period of time."
This statement correctly reflects that under optimal conditions (such as appropriate temperature, pH, and nutrient availability), bacteria can undergo binary fission rapidly, leading to exponential increases in population size. The other statements have inaccuracies regarding the behavior of bacteria under poor conditions and the uniformity of reproduction rates among different bacterial species.