Which bacterium shows a characteristic green sheen when grown on eosin-methylene blue (EMB) agar?
A) Escherichia coli
B) Salmonella enterica
C) Staphylococcus aureus
D) Streptococcus pyogenes
Answer: A
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A cataract involves:
a. clouding of the lens b. damage to the macula c. damage to the cornea d. destruction of the fovea e. destruction of cone cells in retina
An example of a modern-day jawless fish (agnathan) is a
A. angelfish. B. shark. C. perch. D. lamprey.
Which of the following characterize B cells?
A. They are manufactured and mature in the bone marrow. B. They function in antibody mediated immunity against bacteria. C. They directly recognize antigens and undergo clonal selection. D. All of the choices characterize B cells. E. None of the choices characterize B cells.
You have isolated an aerobic gram-positive, endospore-forming bacterium that grows well on nutrient agar. To which of the following groups does it most likely belong?
A) phototrophic bacteria B) gammaproteobacteria C) deltaproteobacteria D) bacillales E) The answer cannot be determined based on the information provided.