Which of the following species was once considered so benign that microbiologists used it to trace movements of air currents in hospitals and over cities?
A. Morganella
B. Providencia
C. Citrobacter
D. Serratia
E. Legionella
Answer: D. Serratia
Biology & Microbiology
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Which of the following occurs in vascular land plants but not charophytes (stoneworts)?
A) sporopollenin B) lignin C) chlorophyll a D) cellulose E) chlorophyll b
Biology & Microbiology
A stimulus for the secretion of ADH is ______.
A. alcohol B. high blood pressure C. high blood osmolarity D. two of the above
Biology & Microbiology
Which of the following is NOT one of the body's nonspecific defenses against pathogens?
A) complement system B) inflammation C) natural killer cell D) cytotoxic T cell E) interferons
Biology & Microbiology
Which of the following is the study of groups of cells, tissues, and organs that work together to perform specific functions?
A) cytology B) anatomy C) histology D) physiology E) embryology
Biology & Microbiology