1. Cell Theory and Prokaryote vs. Eukaryote

2. What is a Cell? Cell – Basic unit of living things.
Organisms are either:
Unicellular – made of one
cell such as bacteria and
amoebas. OR
Multicellular – made of
many cells such as plants
and animals.

3. Scientists to Remember
Robert Hooke (1665) – Observed “cells” in cork

4. Scientists to Remember
Anton van Leeuwenhoek (1674)
Father of Microscopy
Saw tiny living things in pond water.

5. Cell Theory
Confirmed discoveries that all scientists believe to be true about cells:
1. Cells are the basic unit of life.
2. All living things are made of cells.
3. New cells are produced from
existing cells.

6. Team Prokaryotic vs. Team Eukaryotic
1) You and your table partner have to play rock, paper, scissors to determine which team you are on. Best of three.
2) Use your textbook to learn about your type of cell (pgs ). You can work with other people on your team if you want. Take notes!
3) You have about 8 minutes before we touch base.

7. The Discovery of Cells Prokaryotic before nucleus Eukaryotic true

8. Eukaryotes Has a nucleus Bigger and more complex than prokaryotes
Have membrane bound Organelles (golgi, ER, lysosomes…etc)
DNA – double-stranded and forms chromosomes (highly organized)
Can be uni- OR multicellular organisms
Ex: animals, plants, fungi

9. Prokaryotes NO nucleus NO membrane bound organelles (just ribosomes)
Cell Membrane
ALL are unicellular – single cell
Forerunner to eukaryotic cells (smaller and more simple)
DNA – single strand and circular
Ex: ALL Bacteria (smallest known cells) and Archaea 9

10. Similarities Have cell/plasma membranes Have ribosomes Have DNA
Have cytoplasm
Can be unicellular

11. Eukaryote VS. Prokaryote Picture

12. Microscopes
Light Microscope – magnifies tiny organisms up to 1,000 times.
-Uses light and lenses.
-We use these.
Electron Microscope – magnifies
up to a million times.
-Uses electrons.