Most methanotrophs are obligate ________ because ________
A) aerobes / the initial step of methane oxidation requires O2
B) anaerobes / methane is produced in anaerobic environments
C) fermenters / methane only provides enough energy for fermentation
D) heterotrophs / methane does not provide enough carbon for growth
Answer: A
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Why would a compound that interferes with bacterial cell wall synthesis be useful for the treatment of an infection?
A. It would prevent the cells from becoming larger. B. It would prevent replication of DNA. C. It would limit the spread of the infection. D. Answers b and c are correct.
Magnification
a. is the amount that an object's image is enlarged. b. is the extent to which detail in an image is preserved during the magnifying process. c. is the degree to which image details stand out against their background. d. focuses light rays emanating from an object to produce an image.
El Niño is a recurring weather phenomenon
that a. increases global warming. b. stabilizes world climates. c. produces a fluctuation in global weather. d. depletes the ozone layer. e. increases oceanic productivity
An elderly woman is experiencing fever, chest pain, difficulty breathing, and a cough that occasionally brings up mucus containing blood. She reports having visited family in rural New Mexico over the Labor Day weekend. A GMS-stained sample from her lungs shows the presence of large spherules. Which of the following is the most likely infecting agent?
A) Coccidioides immitis B) Blastomyces dermatitidis C) Histoplasma capsulatum D) Paracoccidioides brasiliensis E) Trichophyton rubrum