TEK 6.12A - Multicellular & Unicellular Organisms (Part 1)

What does the prefix "uni" means?

• two

• one

• many

What does multicellular means?

• one cell

• no cell

• many cells

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A scientist is trying to decide whether an organism is unicellular or multicellular. Which information would help the scientist most to make her decision?

• size of the cells of the organism

• what the organism eats

• how many types of cells are in the organism

• how fast the organism grows

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Bacteria is an example of a(n) ______ organism.

• unicellular

• multicellular

• nonliving

• mammal

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They are typically smaller, microscopic organisms

• multicellular

• unicellular

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They are typically larger, microscopic organisms

• multicellular

• unicellular

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Which best describes a difference between a unicellular organism and a multicellular organism?

• A unicellular organism is a plant and a multicellular organism is a human.

• A unicellular organism has one purpose- to survive. A multicellular organism has many cells working together to keep the organism alive.

• A multicellular organism is simple and a unicellular organism is complex.

• A unicellular organism can only be found in certain biomes but a multicellular organism can be found anywhere on Earth.

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Which is an example of a single-celled organism?

• bird

• cricket

• snake

• bacteria

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Which best explains how a single-celled organism can survive without other cells?

• They do not need any substance from outside of the cell.

• They are able to perform all necessary functions within one cell.

• They do not need to perform more than one function to survive.

• They can't survive without other cells.

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Which is an example of a multicellular organism?

• amoeba

• bacteria

• worm

• fungi

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