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Lelechka [254]
3 years ago
6

As sound enters the ear, it vibrates the ______________ at the boundary between the outer ear and middle ear, causing the sound

waves to then vibrate the hammer.
a. ear drum
c. stirrup
b. cochlea
d. anvil
Biology
2 answers:
just olya [345]3 years ago
7 0
A. The ear drum vibrates causing it to move the malleus causing sound.
oee [108]3 years ago
3 0
(A. eardrum <----- is the answer
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