Cell Theory

• All living things are made up of one or more cells.

• The cell is basic unit of all living things.

• Cells only come from existing cells.

Cell Types

Eukaryotic cells

1. They are complex cells.

2. They have Organelles bound (surrounded) by a membrane.

3. They have a Nucleus with DNA inside.

4. Unicellular or Multicellular.

5. Examples are plant and animal cells.

Organisms with eukaryotic cells are called…

Eukaryotes

• Unicellular

Multicellular

Prokaryotic cells

1. Very simple cells with NO organelles.

2. NO nucleus, DNA all over.

3. Usually very small and unicellular.

Mainly BACTERIA

Organisms with prokaryotic cells are called…

Prokaryotes

Viruses

1. Contain only nucleic acids (DNA or RNA)

2. They are NOT made of cells.

3. They are NOT living.