In the United States, how many people per year contract hospital-associated infections?
A) 1 million
B) 2 million
C) 10 million
D) 20 million
Ans: B) 2 million
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An example of a beneficial mutation is
A) a mutation in collagen that causes the skin to be extra stretchy. B) the mutation that causes sickle cell disease. C) a mutation in the CCR5 gene. D) a mutation in a cytokine gene that causes an allergy.
RIFAs are a(n) ____ species
a. host b. parasitic c. pioneer d. keystone e. exotic
Methicillin inhibits cell wall production. Why does this make it an effective antibiotic?
a. The cell wall of human cells is not sensitive to methicillin b. Human cells have a plasma membrane in addition to the cell wall that allows them to survive in the presence of methicillin c. Human cells do not have cell walls d. All humans have a gene giving methicillin resistance e. Human cells and bacterial cells are completely different, so methicillin does not affect human cells
Endosteum
What will be an ideal response?