EQ: How can organisms be classified as single- celled or multicellular?

Turn and Talk What is a cell? What is an organism? What is a single-celled organism? What is a multicellular organism?

Cell Video

Single-Celled Organisms Organisms made up of only one cell. Unicellular organisms can do all of the characteristics of living things: move, reproduce, grow and develop, adapt and respond to environment. Some examples: bacteria, amoeba, yeast, algae

Multicellular Organisms Living things (organisms) made up of more than one cell are multicellular organisms. YOU are a multicellular organism! Turn and Talk: Can you think of any other multicellular organisms?

Multicellular Organism Examples Plants Animals Fungi

Unicellular/Multicellular Venn Diagram With your table, complete the Venn diagram by moving the pieces where they belong. We’ll check afterwards!

Let’s Compare! Unicellular OrganismsMulticellular Organisms Body made up of a single cell.Body is made up of numerous cells The single cell can do everything it needs to do to survive. Difference cells are specialized to perform different functions. The cell body is exposed to the environment on all sides. Only outer cells are specialized to face the environment. An injury of the cell can cause death of the organism. Injury or death of some cells does not affect the organism because they can be replaced by new ones. Lifespan is short due to heavy load of work. Lifespan is longer because work is divided among different cell types. Examples: bacteria, amoeba, algae, yeast Examples: humans, plants, animals, fungi

EQA: How can organisms be classified as single-celled or multicellular?