Where are cilia found in the human body?

A) lining blood vessels
B) oral cavity
C) female reproductive system
D) upper respiratory tract
E) large intestine


Answer: D

Biology & Microbiology

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Which of the below processes naturally releases CO2 into the atmosphere (select all that apply)?

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Approximately _____ percent of a leaf is composed of air spaces

a. 25 b. 33 c. 50 d. 75

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Which of the following is characterized by a cell releasing a signal molecule into the environment, followed by a number of cells in the immediate vicinity responding?

A) hormonal signaling B) autocrine signaling C) paracrine signaling D) endocrine signaling E) synaptic signaling

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Streptococcus pyogenes

A. is alpha-hemolytic. B. is gamma-hemolytic. C. is beta-hemolytic. D. may form endospores. E. is alpha-hemolytic AND may form endospores.

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