The respiratory system includes all of the following structures except the

A) esophagus.
B) trachea.
C) larynx.
D) lung.


Answer: A

Biology & Microbiology

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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

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The study of the interactions of organisms and their physical environment is

a. biology. b. ecology. c. geology. d. paleontology. e. physiology.

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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).

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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.

Biology & Microbiology