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7-1 Cell Theory Prokaryotes vs. Eukaryotes

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Presentation on theme: "7-1 Cell Theory Prokaryotes vs. Eukaryotes"— Presentation transcript:

1 7-1 Cell Theory Prokaryotes vs. Eukaryotes

2 Discovery of the Cell and Cell Theory

3 How were cells discovered?
The first cell was discovered when Robert Hooke looked at cork under a microscope! He saw thousands of tiny empty chambers

4 History of the Cell 1839: Schwann concludes that animals are made of cells 1838: Schleiden concludes that plants are made of cells 1855: Virchow proposes that all cells come from other cells completing the cell theory 1665: Hooke discovers the cell 1674: Van Leeuwenhoek observed tiny living organisms in pond water

5 Cell Theory All living things are made of cells.
A cell is the smallest unit of life. All cells come from preexisting cells.

6 Prokaryotes vs. Eukaryotes

7 Prokaryote vs. Eukaryote
Cell membrane Cytoplasm Prokaryotic Cell (bacteria) Eukaryotic Cell (plants and animals) Nucleus Organelles

8 Prokaryotes Unicellular (Single celled)
No nucleus- DNA is located in the cytoplasm in a simple circle

9 Eukaryotes Contain organelles Often multi-cellular
DNA is found chromosomes located inside the nucleus These are the cells that YOU have!

10 Organelle What is an organelle?
A membrane bound structure that separates cell functions Found in Eukaryotic cells “little organ”

11 2 Basic Cell Types Prokaryotes Eukaryotes

12 Prokaryotes vs. Eukaryotes
Nucleus Endoplasmic reticulum Golgi apparatus Lysosomes Vacuoles Mitochondria Cytoskeleton Cell membrane Contain DNA Ribosomes

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