1. The Cell Theory Obj: Identify the 3 parts of the cell theory
Explain how a specific scientist contributed to the cell theory

2. What is a Cell? Smallest basic unit of all living things
Organisms are either:
Unicellular—made of one cell such as bacteria or amoebas
Multicellular—made up of many cells such as plants and animals

3. The Cell Theory All living things are made of cells
Cells are the smallest basic unit of life
All cells arose from pre-existing cells

4. Contributors Robert Hooke Anton van Leuwenhoek
Discovered cells in cork in 1665
Anton van Leuwenhoek
Father of microscopy
Discovered single organisms (in pond water) in 1673
Schleiden and Schwann (1838 and 1839)
Schleiden—plants are made up of cells
Schwann—animals are made up of cells
Rudolf Virchow (1855)
All cells came from other cells

5. Prokaryotes Pro—before Kary—nucleus Prokaryotes=before a true nucleus
No membrane bound organelles (just ribosomes)
No nucleus
Smaller than eukaryotic cells
Came before eukaryotes
Single stranded and circular DNA
All bacteria are prokaryotes

6. Eukaryotes Eu—true Kary—nucleus Eukaryotes=have a true nucleus
Nucleus with a nuclear envelope
Bigger and more complex than prokaryotes
Have membrane bound organelles
Double stranded DNA in form of chromosomes
Can be uni or multicellular
Examples: animals, plants, fungi

7. Similarities
Contain all 4 biomolecules (carbs, lipids, proteins and nucleic acids)
Ribosomes
DNA
Metabolism
Can be unicellular
Have plasma membrane or cell wall