The respiratory system includes all of the following structures except the
A) esophagus.
B) trachea.
C) larynx.
D) lung.
Answer: A
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The amino acids of a growing polypeptide chain are held together by what kind of bond during the elongation stage of translation?
A. hydrogen B. peptide C. glycosidic D. noncovalent E. lactose
The study of the interactions of organisms and their physical environment is
a. biology. b. ecology. c. geology. d. paleontology. e. physiology.
In M. xanthus, ________ motility is a kind of twitching that is governed by the production of retractable type IV pili, only observed when cells are in a group.
Fill in the blank(s) with the appropriate word(s).
A member of the ________ has been implicated as having a role in obesity.
A. adenoviruses. B. herpesviruses. C. poxviruses. D. parvoviruses. E. both herpesviruses and poxviruses.