If the bacterium Staphylococcus aureus experiences a cost for maintaining one or more antibiotic-resistance genes, then what should happen in environments from which antibiotics are missing?

A. These genes should continue to be maintained in case the antibiotics ever appear.
B. These bacteria should be outcompeted and replaced by bacteria that have lost these genes.
C. The bacteria should start making and secreting their own antibiotics.
D. The bacteria should try to make the cost worthwhile by locating, and migrating to, microenvironments where traces of antibiotics are present.


B. These bacteria should be outcompeted and replaced by bacteria that have lost these genes.

Biology & Microbiology

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People do not develop a secondary immune response to influenza because

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wastes with maternal blood are indicated by a. A. b. B. c. C. d. D. e. E.

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The biome with the greatest amount of topsoil and

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