Under the Microscope

These euglena are unicellular organisms. They are made of

• only one cell each

• many cells

This is a multicellular organism. This organism is made of 

• many cells

• only one cell

These are red blood cells. We have many red blood cells in our bodies. Are humans unicellular or multicellular?

• humans are multicellular

• humans are unicellular

Even though you need a microscope to see this organism, it is still made of several different types of cells. What vocabulary word describes it?

• multicellular

• unicellular

Spirogyra is a type of multicellular plant. What clues might you use to determine that Spirogyra is a type of plant?

• It is green and it is not moving under the microscope

• It is cylinder-shaped and its legs are moving under the microscope

It is possible that you will find Ostracods in a drop of pond water! What will you have to use to see these multicellular organisms?

• microscope

• microwave

This is human bone tissue. You have seen red blood cells and bone cells in this video. Which of the following must be true?

• Humans are examples of multicellular organisms; we are made of many different types of cells

• Humans are examples of unicellular organisms; we are made of only a single cell