Microscopes, Cell Theory, Prok/Euk

Front

What is the purpose of the scanning objective lens on a microscope?

Back

The scanning objective lens is used to locate the specimen on the slide and provides the lowest magnification.

Front

When should you use the diaphragm on a microscope?

Back

The diaphragm is used to adjust the amount of light that reaches the specimen.

Front

What is the function of the coarse adjustment knob on a microscope?

Back

The coarse adjustment knob is used to focus the image under low power by moving the stage up and down.

Front

What part of the microscope is referred to as the arm/neck?

Back

The arm/neck is the part of the microscope that supports the body tube and connects it to the base.

Front

What is the role of the fine adjustment knob?

Back

The fine adjustment knob sharpens the image under high magnification.

Front

Define cell theory.

Back

Cell theory states that all living organisms are composed of cells, cells are the basic unit of life, and all cells arise from pre-existing cells.

Front

What distinguishes prokaryotic cells from eukaryotic cells?

Back

Prokaryotic cells lack a nucleus and membrane-bound organelles, while eukaryotic cells have a nucleus and organelles.

Front

Give an example of a prokaryotic organism.

Back

Bacteria are examples of prokaryotic organisms.

Front

What is an example of a eukaryotic organism?

Back

Plants, animals, fungi, and protists are examples of eukaryotic organisms.

Front

What is the function of the body tube in a microscope?

Back

The body tube holds the eyepiece and the objective lenses at the correct distance from each other.