Examlex
Repressible operons require that ______ binds to the repressor protein before it can bind to the operator.
Snail Shell
The hard, spiral external shell of a snail, serving as both protection and support.
Myringoscope
A medical device used to examine the eardrum and the passage of the outer ear.
Eardrum
A thin membrane that separates the outer ear from the middle ear and vibrates in response to sound waves.
Audiometer
An instrument used to assess hearing acuity by generating tones of specific frequencies and intensities.
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