1. Cell Types: Prokaryotic and Eukaryotic

2. Characteristics of Living Things
Living things respond to their environment
Living things need energy
Living things grow 
Living things reproduce
Living things must get rid of waste
Living things are made of cells
Take in nutrients
See page 10
(c) McGraw Hill Ryerson 2007

3. (c) McGraw Hill Ryerson 2007
Cell Theory
The cell is the basic unit of life.
All organisms are composed of one or more cells.
All cells come from other living cells.
See pages 31-32
(c) McGraw Hill Ryerson 2007

4. Cells can be classified into two main groups
Video Amoeba Sisters Prokaryotes and Eukaryotes

5. Prokaryotic Cells Are cells without a nucleus
Simpler than eukaryotic cells
Have few internal structures
Internal structure are not surround by membranes
Unicellular organisms
all bacteria are prokaryotes
Example E. coli

6. Eukaryotic Cells Have a nucleus, which contains genetic material
Have organelles (internal structures which carry out cell processes) surrounded by membranes
Larger and more complex than
prokaryotic cells
Unicellular or multicellular organisms
Example: any cell from a plant, animal  Un

7. Examples of Eukaryotic Cell
Unicelluar: 
Amoeba
Paramecium
Multicellular: 
Any cell from a plant or animal

8. Prokaryotes are much smaller than Eukaryotes

9. Comparison of Prokaryotic and Eukaryotic Cells
Characteristic
Prokaryotic Cells
Eukaryotic Cell
Genetic material contained in nucleus, surrounded by a membrane No
Yes
Organelles surrounded by membranes
Size and Complexity
Smaller, less complex
About 10x as large and more complex
Can carry out all processes needed to stay alive
Example
Bacterium
Liver cell of an animal

11. Bacteria and Viruses

12. Difference between Bacteria and Virus
Amoeba Sisters   

13. (c) McGraw Hill Ryerson 2007
Bacteria
Bacteria are prokaryotic cells
Bacteria are unicellular micro-organisms
Some bacteria are harmful and cause diseases such as: tuberculosis and strep throat.
Some bacteria are helpful - used to make food such as: cheese and yogurt, some have digestive enzymes that help digest food in our intestines.
Bacteria are very small (microscopic)
Can vary from 1nm-20nm in length
See pages
(c) McGraw Hill Ryerson 2007
Take the Section 1.2 Quiz

14. Bacteria are very small
Average range is 1um – 20 nm in length
mm = millimeter 1/1000 of a meter
um = micrometer 1/ of a meter
Nm = nanometer 1/ of a meter
So 1 um is 1/1000 of a millimeter

15. Bacteria
Bacteria are often grouped by the shape of their cells.

16. Viruses
Viruses are tiny non-living particles capable of producing only when they are inside a host cell.
Viruses do not contain any cell organelles but do contain genetic material (DNA or RNA)
Viruses can reproduce by using a host cell.
Examples: HIV, chicken pox, and influenza

17. Virus Structure

18. Virus Life Cycle The virus attaches to a specific host cell.
The virus injects its DNA into host cell.
The viruses DNA causes host cell to make new viral DNA and protein.
New viruses are created inside host cell
Host cell bursts open and the new viruses are release to infect other host cells.

19. Life Cycle of a Virus video

20. Create a Venn Diagram
Comparing prokaryotic and eukaryotic cells.

21. Which one is the prokaryotic cell?
What makes prokaryotic cells different from Eukaryotic cells?

22. Homework
Read p32 to 34
Workbook pages 10 to 12