Question

the coarse adjustment knob on the microscope
multiple choice
moves the stage left and right.
locate the focus plane.
fine - tunes the focus.
all of the answer choices are correct.

Explanation:

The coarse - adjustment knob on a microscope is used to quickly move the stage up and down to locate the focus plane. It is not for moving the stage left and right, and fine - tuning the focus is the job of the fine - adjustment knob.

Answer:

locates the focus plane.