Shigellosis can be differentiated from salmonellosis by:
A) The presence of nonmotile noncoliforms
B) The presence of bloody diarrhea
C) The lack of fever
D) The presence of nonmotile noncoliforms in bloody diarrhea
E) Abdominal cramps and fever
Ans: D) The presence of nonmotile noncoliforms in bloody diarrhea
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What type of bond is formed when two atoms share electrons?
A.) electronic bond B.) covalent C.) electrostatic D.) hydrogen E.) ionic
Gas exchange occurs when
a. oxygen in the alveoli diffuses into the blood in the capillaries b. oxygen binds with hemoglobin in the red blood cells c. the red blood cells give up oxygen to the cells of the body tissues d. all of the above
Plants lacking well-developed conducting systems such as mosses, liverworts, and hornworts have been called
A. gametophytes. B. angiosperms. C. bryophytes. D. gymnosperms. E. sporophytes.
Ribosomes are made up of which kind of nucleic acid?
A) mRNA B) tRNA C) rRNA D) DNA