Genetic variation occurs in all organisms. Bacteria that cause ear infections, for example, are genetically similar and produce the same effect, but some variations may exist such that some of the bacteria might be resistant to antibiotics, while others are not. Which of the following would increase the antibiotic resistant bacterial populations? A. newer and better antibiotics B. an overusage of antibiotics C. contracting multiple diseases simultaneously D. using a warm-air humidifier
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Which of these is an example of land degradation? a. containers designed to store pollutants leak. b. fertilizers provide too many nutrients to crops. c. garbage is buried so the land can be reclaimed later. d. a drought kills all the plants in an area, leaving bare land
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Genetic variation occurs in all organisms. Bacteria that cause ear infections, for example, are gene...
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