Why keep petri dishes in a warm and dark place
Place the Petri dishes in a warm, dark place. Leave the Petri dishes in a warm, dark place where the bacteria can develop, undisturbed, for several days. Remember to store the dishes upside down, so the bacterial growth remains undisturbed by any water droplets.
The ideal temperature for growing bacteria is between 70 and 98 degrees F (20-37 degrees C). If necessary, you can place the Petri dishes in a cooler location, but the bacteria will grow a lot more slowly.
Leave the bacteria to develop for 4-6 days, as this will give the cultures enough time to grow. Once the bacteria begins to grow, you may notice a smell coming from the dishes.
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Post time: Aug-10-2022