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A student is looking at a Paramecium sp. using a compound light microscope. She turns the iris diaphragm to adjust ___________________.

the brightness by controlling the amount of light beaming through the image

the objective lens and increase the magnification of the image

the electrons beamed through the image to regulate the brightness

the position of the Paramecium sp. on the slide in order to center it for maximum magnification

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MissPhiladelphia
I believe the correct answer from the choices listed above is the first option. A student is looking at a Paramecium sp. using a compound light microscope. She turns the iris diaphragm to adjust the brightness by controlling the amount of light beaming through the image. Hope this answers the question.

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