In 1959, doctors began using the powerful antibiotic methicillin to treat infections of
A. Staphylococcus aureus, but within two years, methicillin-resistant strains of S. aureus (MRSA) appeared. How did the resistant strains of S. aureus emerge?
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.
B. In response to treatment of Staphylococcus aureus infections with methicillin, some bacteria began to synthesize cell walls using a protein that was not affected by methicillin. These bacteria survived the methicillin treatments and reproduced at higher rates than did other individuals. Over time, these resistant individuals became increasingly common.
C. In response to treatment of Staphylococcus aureus infections with methicillin, bacterial populations gradually began to synthesize cell walls using a protein that was not affected by methicillin.
A. Staphylococcus aureus, but within two years, methicillin-resistant strains of S. aureus (MRSA) appeared. How did the resistant strains of S. aureus emerge?
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.
You might also like to view...
The genetic code is said to be degenerate because ____
a. some codons that do not specify an amino acid b. most amino acids are represented by more than one codon c. the code varies considerably between different organisms d. the code is commaless, with no indicators of spaces between codons e. the code varies considerably between different cell types within a multicellular organism
What is the function of mammalian apocrine glands?
a. sweat secretion b. waste excretion c. scent secretion d. lipid secretion
The only population of humpback whales that is showing recovery from the effects of whaling is the:
a. North Pacific population. b. North Atlantic population. c. Maui population. d. Southern Hemisphere population. e. Southern Pacific population.
Dermatophytes digest the protein ________, found in the skin, hair, and nails.
Fill in the blank(s) with the appropriate word(s).