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c.)staphylococcus aureus bacteria that were able to synthesize cell walls using a protein that was not affected by methicillin survived the methicillin treatments and reproduced at higher rates than did other individuals. over time, these resistant individuals became increasingly common.
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feeling stressed is common during pregnancy. when you're pregnant, this type of stress can increase the chances of having a premature baby (born before 37 weeks of pregnancy) or a low-birthweight baby (weighing less than 5½ pounds). babies born too soon or too small are at increased risk for health problems.