6. What does it mean when the objectives of a microscope are parfocal?
A. The microscope has the highest magnification.
B. The image in clear focus to LPO focused after shifting under LPO remains
C. The image seen under the HPO is clear.
D. The image seen under LPO is very clear.

7. Which part of the microscope will you use to increase from 100x to 400x? B. diaphragm the magnification
A. field of view
C. revolving nosepiece
D. coarse adjustment knob

8. Which of the following statements best explains why you should use the fine adjustment knob with the high power objective (HPO)?

A. It moves the body tube quickly.
B. The fine adjustment knob helps you to focus slowly
C. There is a greater risk of breaking the slide.
D. It moves the specimen under the objectives.​