1

Which of the following is a lens that focuses the light coming from a microscope’s illuminator onto the microorganism being viewed?

Condenser lens

Objective lens

Ocular lens

Oil immersion lens

RATIONALE

The condenser lens is located below the microscope stage and functions to gather the light coming from the illuminator and direct it toward the specimen being viewed.

CONCEPT

 Observing the Microscopic World

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2

Select the statement that is true for acidic stains.

They can be used for chemical fixation.

They stain molecules and structures that carry a positive charge.

India ink is an example of an acidic stain.

They produce only positive stain images

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