The human voice is generated by air moving through the _____

a. pharynx
b. glottis
c. epiglottis
d. pleura
e. trachea


ANSWER: b

Biology & Microbiology

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The two-stage thymic selection process for selecting self-tolerant, antigen-reactive T cells results in

A) allelic exclusion. B) clonal deletion. C) complementarity-determining regions. D) somatic hypermutation.

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High-fat, high-protein diets make the ________ work harder, increasing the risk of problems with this organ

a. pancreas b. liver c. kidneys d. intestines

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All of the following statements about the brown algae are true except:a

this group includes the most complex algae that have blades, stipes, and holdfasts. b. they share a common ancestor with representatives of the plant kingdom. c. they represent the largest members of the algae called seaweeds. d. they are harvested for algin, which is used in a variety of commercial products. e. they are ecologically important as producers and in providing habitats along rocky coastlines.

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Which of the following is a vascular plant?

a. moss b. fern c. liverwort d. hornwort e. charophyte

Biology & Microbiology