Which species of Burkholderia is the one most commonly found in clinical specimens?
a. Burkholderia ralstonia
b. B. pseudomallei
c. B. mallei
d. B. cepacia
D
B. cepacia is the species most commonly found in clinical specimens. This organism is able to survive on or in medical devices and disinfectants. An intrinsic resistance to multiple antimi-crobial agents also contributes to this organism's survival in hospitals.
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What temperature is most commonly used for autoclaves to sterilize growth media and other devices prior to experimentation?
A) 95 °C B) 101 °C C) 121 °C D) 140 °C
Which of the following substances helps make cells of xylem rigid to avoid collapse?
A. cellulose B. lignin C. chitin D. spongin E. parenchyma
Metamerism refers to:
A. a body type that contains clearly distinguishable dorsal and ventral surfaces. B. the division of the body into a series of repeating segments. C. loss of crystalline structure of an amorphous state. D. None of the choices is correct.
In humans, if nondisjunction led to an individual with a genotype of XXY, that person would
A. be male because each cell has one Y chromosome. B. display both male and female characteristics. C. not survive. D. be female because each cell has two X chromosomes.