1. Laura uses a cotton swab to collect microorganisms from a hand rail and streaks a plate. On the fourth day of incubation, she does not observe visible microbial growth. Given that microorganisms are literally everywhere, give at least three reasons why Laura may not have observed microbial growth?
Added by Brian N.
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Step 1: Laura may not have observed microbial growth because she used the wrong medium for the plate, which may not have the proper pH and food source for the bacteria to grow. Show more…
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