Pyocyanin, a greenish-blue pigment produced by pseudomonads, acts as a virulence factor by
A) digesting lipids in tissues.
B) forming a biofilm.
C) breaking down reactive oxygen species.
D) lysing red blood cells.
E) generating reactive oxygen species.
Answer: E
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The organ that is responsible for secreting cocoons in the oligochaetes is known as the
A. nephridia. B. setae. C. radula. D. clitellum. E. lophophore.
The oxygen needed by plants is ultimately derived
from a. aerobic respiration. b. photosynthesis. c. anaerobic respiration. d. glucose. e. carbon dioxide.
A flagellated protist lives inside the guts of termites and enables the termites to digest the cellulose in wood as a food source. This protist belongs to the
A) ciliates. B) parabasalids. C) amoebas. D) apicomplexans. E) Archaea.
The random shotgun method is used in
A) amplification of unknown DNA. B) transforming plant cells with recombinant DNA. C) genome sequencing. D) RFLP analysis. E) forensic microbiology.