Final answer:
Geobacillus steurothermophilus must be incubated at a temperature of 70°C.
Step-by-step explanation:
The Geobacillus steurothermophilus must be incubated at a temperature of 70°C.
Organisms have preferred growth temperatures where their reproduction rate is the greatest. Geobacillus steurothermophilus is a thermophile, which means it grows best at high temperatures.
Thermophiles are organisms that thrive at temperatures above 45°C, and Geobacillus steurothermophilus is one of them. Incubating at 70°C creates the optimal environment for its growth.