A young woman presents to the emergency room with fever, headache, and vomiting. Food poisoning is suspected, she is given supportive care, and released. One week later she returns to the hospital in acute renal failure. A medical history reveals that
she had been a volunteer at an orphanage in a rural section of a Caribbean island recently hit by a hurricane. During evacuation from the island, she had to wade through floodwaters suffered several abrasions on her legs and feet. What is the most likely pathogen based on her symptoms and history?
A) uropathogenic E. coli
B) BK virus
C) leptospirosis
D) candiduria
E) Staphylococcus saprophyticus
Answer: C
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The inheritance of eye color indicates that
A) many different genes determine eye color, each contributing to different degrees. B) eye color is sensitive to what a pregnant woman eats. C) other characteristics, such as the texture at the back of the eye, can affect the phenotype. D) a person's sex influences inheritance of eye color.
Competitive exclusion is the result of
a. mutualism. b. commensalism. c. competition. d. predation. e. parasitism
What conclusion was based on experiments with "maze-bright" and "maze-dull" rats?
A) An enriched environment increases maze-running ability only in dull rats. B) A poor environment adversely affects maze-running ability in both bright and dull rats. C) Maze-running ability is highly heritable and unaffected by environment. D) Maze-running ability is based entirely on environment and unaffected by genes.
Photosynthetic organisms derive their carbon from
A) carbon monoxide. B) carbon dioxide. C) hydrocarbons. D) methane.