In one hospital, Pseudomonas aeruginosa serotype 10 infected the biliary tract of 10 percent of 1300 patients who underwent gastrointestinal endoscopic procedures. After each use, endoscopes were washed with an automatic reprocessor that flushed detergent and glutaraldehyde through the endoscopes, followed by a tap water rinse. P. aeruginosa serotype 10 was not isolated from the detergent,
glutaraldehyde, or tap water. What was the source of the infections?
A) bacterial cell walls in the water
B) a biofilm in the reprocessor
C) contaminated disinfectant
D) fecal contamination of the bile ducts
E) None of the answers is correct.
B
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A potato has a diploid number of 48. If an egg of this plant has 23 chromosomes, the most likely explanation is that
a. normal meiosis has occurred. b. nondisjunction occurred during meiosis I. c. normal mitosis has occurred. d. nondisjunction occurred during mitosis. e. crossing over occurred during meiosis I.
If a man with blood type A and a woman with blood type B produce an offspring, what might be the offspring's blood type?
A) A, B, or O B) AB only C) AB or O D) A, B, AB, or O
Images of living specimens can be produced using atomic force microscopes
Indicate whether the statement is true or false
root bio-
What will be an ideal response?