The hepadnaviruses
A. include the adenoviruses.
B. show tropism for the liver.
C. are nonenveloped, double-stranded DNA viruses.
D. are transmitted by respiratory secretions.
E. All of the choices are correct.
Answer: B
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Ampicillin, like penicillin, must be administered by injection because it is rapidly degraded in the stomach and cannot, therefore, be given orally.
Answer the following statement true (T) or false (F)
The final outcome of most host-parasite relationships depends on
A. the host's defenses. B. the number of organisms present in or on the host. C. the virulence of the organism. D. All of the choices are correct.
When doing SSU (small subunit ribosomal RNA) of a mixed population of microbes from an environmental sample, specific ________ are identified.
A. genotypes B. unknown microbes C. phylotypes D. phenotypes
Which statement best describes the difference between cell division in plant and animal cells?
a. In animal cells but not plant cells, cytokinesis is accomplished by formation of a cleavage furrow. b. In plant cells but not animal cells, cytokinesis is accomplished by formation of a cleavage furrow. c. In plant cells, centrosomes have an important role in spindle formation, while in animal cells centrosomes do not function during cell division. d. In animal cells, replication of chromosomes occurs during interphase, while in plant cells replication occurs when the nuclear envelope disintegrates. e. Animal cells divide via the cell cycle whereas plant cells divide by binary fission.