Shiga toxin-producing E. coli characteristics include all of the following except that it
A. is transmitted by ingestion of contaminated, undercooked food, especially hamburger.
B. in some cases, leads to the development of hemolytic uremic syndrome (HUS) with possible kidney failure
C. causes a bloody diarrhea.
D. has a reservoir inside of cattle intestines.
E. only causes occupational illness in people who work with animals.
Answer: E
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B. pertussis colonies growing on Regan-Lowe medium yields which of the following colonial morphologic appearances?
a. Star-shaped colonies b. Mercury-drop colonies c. Yellow-pigmented colonies d. Shiny black-pigmented colonies
What is the evidence that genes are involved in a white-crowned sparrow learning to sing?
A. If the sparrows are deafened after learning to sing, they will sing abnormally as adults. B. If they do not hear singing from other white-crowned sparrows, they will eventually learn to sing normally. C. If they hear singing from both white-crowned sparrows and other species of sparrows, they will sing abnormally. D. If they do not hear singing from other white-crowned sparrows, they will sing, but abnormally. E. If they do not hear singing from other white-crowned sparrows, they will not sing at all.
In meiosis II cytokinesis results in the production of
A. two haploid daughter cells. B. four diploid daughter cells. C. four haploid daughter cells. D. two diploid daughter cells. E. one daughter cell identical to the parent cell that underwent meiosis.
The ________ of a virion determines the type of cell it enters
A) nucleic acid B) matrix proteins C) glycoproteins D) lipid molecules E) shape