The drug used against intestinal anaerobic bacteria, that can also alter normal biota leading to antibiotic-associated colitis, is ________.
A. gentamicin
B. clindamycin
C. bacitracin
D. chloramphenicol
E. ciprofloxacin
Answer: B
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Chemical reactions involving ________ have been proposed as energy-yielding reactions for primitive organisms
A) Fe, O2, and H2 B) S, O2, and H2 C) S, and O2 D) S, and H2
Which of the following is not true? a. Even if the total fertility rate drops to the replacement level, population will continue to increase for over 50 years
b. China has a wide-reaching family planning program. c. World population is expected to peak at 8.9 billion in 2050. d. The worldwide total fertility rate has been increasing steadily for 50 years.
Uses of chlorofluorocarbons (CFCs) include all
EXCEPT which of the following? a. gasoline additives b. aerosol propellants c. refrigeration coolants d. manufacture of plastic foam e. components of solvents
Clostridium botulinum is made virulent by incorporated prophage genes encoding the botulinum toxin. What term describes this process?
A. adsorption B. budding C. lysogenic conversion D. latent phase E. lytic phase