As food is swallowed it is prevented from entering the trachea by the
A. pharynx.
B. epiglottis.
C. larynx.
D. saliva.
E. bronchioles.
Answer: B
Biology & Microbiology
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The northern boundary of the distribution of Saguaro cacti is defined by
A. areas in which temperatures do not drop below freezing. B. the availability of water year round. C. the presence of pollinating insects. D. proximity to coastal environments. E. the frequency of low-intensity fires.
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Pheromones are a type of ________ signal
a. mechanical b. chemical c. tactile d. auditory e. physical
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What does "You are what you eat" really mean?
It's related to macromolecules
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Amoebas move by
A. cilia. B. gliding mechanisms. C. flagella. D. pseudopods. E. All the choices are correct.
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