1. Unicellular vs. multicellular

2. Just like any community, an organism has many jobs that need to be filled. If an organism is unicellular (sometimes called a micro-organism), then each of these jobs has to be performed by the same cell. Examples of unicellular organisms: paramecia, amoeba, bacteria If it is a multicellular organism, then the jobs are most likely performed by different types of cells

3. Consider the methods used by a human to perform the basic functions of life. Now keeping in mind that a unicellular organism is also a living thing, it must also perform these same functions. How might the two compare?

4. Human (multicellular) Amoeba (unicellular)
Function
Human (multicellular)
Amoeba (unicellular)
Obtaining Food
Obtaining Water
Obtaining Oxygen
Movement
Mouth intakes. Digestive system breaks is down. Blood to transport.
Osmosis
Mouth intakes. Intestines absorb. Blood transports.
Cell membrane expands and contracts
Muscle cells expand and contract to move body parts.
Diffusion
Lungs take oxygen out of the air. Blood to transport
Cell membrane stretches out and surrounds food

5. Function Human Amoeba Obtaining Food Obtaining Water Obtaining Oxygen
Mouth intakes. Digestive system breaks is down. Blood to transport.
Cell membrane stretches out and surrounds food
Obtaining Water
Mouth intakes. Intestines absorb. Blood transports.
Osmosis
Obtaining Oxygen
Lungs take oxygen out of the air. Blood to transport
Diffusion
Movement
Muscle cells expand and contract to move body parts.
Cell membrane expands and contracts

6. Specialized Cells
Today we will look at specialized cells; cells in a multicellular organism that perform a specific job. You will be assigned a specialized cell type and will research and document information about that type of cell. All of this information will be recorded in a shared cloud document, which will result in you having a note about each of these types of cells. To open the document, go to the homework site and click the link, then log in to your google account to be able to view and edit.