Sulfate-reducing bacteria transfer electrons to
__________ in their environment.
a. SO2
b. H2
c. H2SO4
d. S
e. SO4
Answer: e
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If sixty snow geese were alive in 1926 and 856 existed in 2001, what is r?
A) 0.070 B) 0.035 C) 0.094
Answer the following statements true (T) or false (F)
1. Poor-quality clinical specimens are unlikely to produce clinically relevant results. 2. The Director of the Clinical Microbiology Laboratory (CML) is ultimately responsible for the quality of clinical specimens submitted to the CML. 3. Special disinfection procedures are required to prevent indigenous microflora of the skin from contaminating blood cultures. 4. Bacteriuria is a sure sign of urinary tract infection. 5. CSF specimens are treated as “stat” specimens in the Clinical Microbiology Laboratory.
Although they have a diversity of structures, all members of this group of organic molecules are
primarily nonpolar and thus water-insoluble.
a. proteins b. lipids c. nucleic acids d. carbohydrates e. amino acids
Birds and insects both have wings, but we do not consider this similarity as evidence of relatedness because
A. the wings are not homologous structures with a common ancestral origin. B. bird wings, but not insect wings, function on the physics principles of lift. C. there is no fossil link between these groups. D. birds and insects did not evolve in the same region or live at the same time period. E. insect wings are vestigial.