GEN. BIO 1 1ST QUARTER - CELL THEORY

Robert Hooke (1665)

Who was able to observe structure-like compartments in a cork specimen and was able to coin the term “cell”?

Anton van Leeuwnhoek (1676)

He stated that all tiny living organisms (animalcules) can be observed under a microscope.

Spontaneous Generation

This is an obselete theory which states that all living things can be originated from nonliving matter.

Matthias Schleiden (1838)

He is a German botanist who concluded that all plant parts are made of cells.

Theodor Schwann (1839)

This person is a botanist who stated that all animal tissues are composed of cells.

Rudolf Virchow (1858)

This person concluded that all cells come from pre-existing cells.

What are the three postulates that sum up to the cell theory?

1. All living organisms are composed of one or more cells

2. The cell is the basic unit of life

3. All cells came from pre-existing cells

Cell Theory

This is a universal theory formed by different scientists regarding to living organisms and their constituents.

Viruses

These are parasites that have non-living characteristics which gather genetic information in the form of RNA (ribonucleic acid).