Cell Theory & Microscopes

Front

What is the cell theory?

Back

The cell theory states that: 1) All living organisms are composed of one or more cells, 2) The cell is the basic unit of life, and 3) All cells arise from pre-existing cells.

Front

Who is known for discovering that all plants are made of cells?

Back

Theodor Schwann.

Front

Which scientist was the first to examine cork cells?

Back

Robert Hooke.

Front

What is the primary function of a compound microscope?

Back

A compound microscope allows light to pass through an object and then through two or more lenses to magnify the image.

Front

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

Back

The course adjustment knob is used to bring the specimen into general focus.

Front

What are the three main components of the cell theory?

Back

1) All living organisms are made of cells, 2) The cell is the basic unit of life, 3) All cells arise from pre-existing cells.

Front

What is the difference between prokaryotic and eukaryotic cells?

Back

Prokaryotic cells do not have a nucleus or membrane-bound organelles, while eukaryotic cells do.

Front

What is the role of the ocular lens in a microscope?

Back

The ocular lens, or eyepiece, is the lens you look through to see the magnified image of the specimen.

Front

What is the significance of Robert Hooke's work with cork cells?

Back

Robert Hooke's work led to the discovery of cells and the coining of the term 'cell'.

Front

What is the function of the diaphragm in a microscope?

Back

The diaphragm controls the amount of light that reaches the specimen.