Which structure runs from the middle ear to the pharynx to equalize air pressure?
a. cochlea
b. auditory canal
c. tympanic membrane
d. round window
e. eustachian tube
ANSWER: e
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You are an evolutionary biologist analyzing the evolution of embryo development in different species. You identify an important gene that controls the placement of body regions in fruit flies, mice, and chickens, and you find the gene is exactly the same
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What property describes the plasma membrane's ability to regulate movement of molecules into and out of the cell?
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