Use of antibiotics in animal feed leads to antibiotic-resistant bacteria because
A) bacteria from other animals replace those killed by the antibiotics.
B) the few surviving bacteria that are affected by the antibiotics develop immunity to the antibiotics, which they pass on to their progeny.
C) the antibiotics cause new mutations to occur in the surviving bacteria, which results in resistance to antibiotics.
D) the antibiotics kill susceptible bacteria, but the few that are naturally resistant live and reproduce, and their progeny repopulate the host animal.
E) the antibiotics persist in soil and water.
D
You might also like to view...
How many different biochemicals were detected in samples from potatoes?
a. 5 b. 2 c. 3 d. 4
To exert effects on its target cell, ________ would require a second messenger
Fill in the blank(s) with the appropriate word(s).
What aspect of cellular respiration occurs in the cytoplasm in eukaryotic cells?
A. The Citric acid cycle B. ATP synthesis C. Glycolysis D. Pyruvate oxidation E. The electron transport chain
Bongkrekic acid is an antibiotic that inhibits the ATP/ADP transport protein in the inner mitochondrial membrane. Which of the following will allow electron transport to occur in mitochondria treated with bongkrekic acid?
(a) placing the mitochondria in anaerobic conditions (b) adding FADH2 (c) making the inner membrane permeable to protons (d) inhibiting the ATP synthase