1. Aim: How are cells classified?

2. How do these cells compare?
SIMPLE
COMPLEX

3. Cells are broken down into two main classes:

4. Prokaryotes:
Were probably the first life forms to appear on earth 3.5 billion years ago
What were the conditions on Earth at this time?
Hot
Little Oxygen
Abundant Lightning
4) Volcanic Activity
Harsh Early Earth

5. Why do you think Prokaryotes were the first life forms on earth?
Simple Structures
Their ability to tolerate harsh environments
Their ability to adapt to changing environments

6. What are some features of prokaryotes?
Prokaryotes do not have nuclei, they do have DNA.
Prokaryotes have NO NUCLEUS!!
Have few organelles (mini-organs)
PROKARYOTES = BACTERIA

7. What organisms are made up of eukaryotic cells?
Plants
Protists
Animals
Fungi
All other living things are made up of Eukaryotic Cells

8. What are some features of typical eukaryotic cells?
They are more complex
Appeared later on earth
They have nuclei
They are larger
Have more organelles
Have membrane bound organelles

9. Eukaryotes

10. CELL TYPES EUKARYOTIC HAVE ORGANELLES HAVE NUCLEUS MODERN CELLS
All other living things: animals, plants, fungi, protist (unicellular organisms)
PROKARYOTIC
HAVE only a few ORGANELLES
HAVE NO NUCLEUS
PRIMITIVE CELLS
Only Bacteria

11. Membrane –bound organelles
Review Chart:
Prokaryotes
Eukaryotes
Nucleus
Genetic Information
Cytoplasm
Cell Membrane
Cell Wall
Ribosomes
Size
Membrane –bound organelles 
In cytoplasm
In nucleus     
Some do  
smaller
Larger 

12. What do all cells have in common?
Cell membrane – gives shape to the cells and allows things in and out.
The cytoplasm – the jelly like material where all cell parts are found

13. ENDOSYMBIOTIC THEORY