Organisms can be either single-celled or multi-celled; single-celled organisms like bacteria and algae consist of only one cell and require a microscope to see, while multi-celled organisms such as plants, animals, and fungi are made of many cells that work together to perform specialized functions.

1. Multi and Uni Celled
Organisms

2. Did you know???
• Both plants and animals can be made of one cell-or
millions of cells like you.
• One-celled (single-celled) organisms, however,
tend to be different from those with many cells.

3. Single-Celled Organisms
• Amoebas, Algae, Plankton, and bacteria
are single-celled organisms.
• You need a microscope to see single-
celled organisms.

4. Multi Celled Organisms
• Living things made up of more than one
cell are multi-celled organisms.
• You are a multiple celled organism.
• Can you think of any other multi-celled
organisms?

5. Multi Celled Examples
Plants
Animals
Fungi

6. Single-celled organisms are made of only one
cell.
Example: algae, amoeba, paramecium
Multi-cellular organisms, such as plants and
animals, have a higher degree of specialization
where the cells work together and function to
create a living organism.
Example: a human –

7. Single-Celled BOTH Multi-Celled