Biology
rwolf224
2

The microorganisms present on day 5 were (1) newly added from the sterile culture medium (2) offspring of antibiotic-resistant individuals (3) organisms that were all present on day 1 (4) offspring with no resistance to the antibiotic

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chasegarza11

The microorganisms present on day 5 were "(4) offspring with no resistance to the antibiotic" since antibiotics would have eliminated an unfit contenders. 

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