1. Single and Multi-Celled Organisms
By: Mr. Yust

2. Single-Celled Organisms
Range greatly in size: 1 micron (bacteria) to 100 microns (protozoans)
Very Diverse: the structures and functions of each organism are very different

3. Single Celled Organisms….. Different Types
Amoeba
Algae
E. coli
All kinds of molds

4. What is an Amoeba? A single cell organism that has no definite form.
Can be either aquatic or parasitic
Moves around by attaching itself to a pseudopod

5. What is Algae? Aquatic organisms that contain one cell.
Algae can also contain more than one cell.
-Why wouldn’t they be classified as a plant then?

6. What is E. coli? Normally found in human intestines.
E.coli infections come from:
Eating undercooked ground beef (the inside is pink)
Drinking contaminated (impure) water
Drinking unpasteurized (raw) milk
Working with cattle

7. Multi-Cellular Organisms
Multi-Cellular organisms contain more than one cell.
Much larger then single-celled organisms and can be seen with the naked eye.

8. Multi-Cellular Organisms Continued…….
All plants and animals are multi-celled organisms.
All plants and animals are made up of differentiated cells.
Differentiated cells are a group of cells that work together and form tissue.