Unicellular and Multicellular Organisms

Which best describes all unicellular organisms?

• Every cell is round

• Every cell can make food.

• Every cell can move on its own.

• Every cell performs all life functions.

A single-cell organism can do everything a cell from a multicellular organism can do except

• specialize

• reproduce

• use energy

• make protein

Which organisms are capable of surviving as a single cell?

• bacteria

• humans

• plants

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Which is an example of a single-celled organism?

• acorn

• amoeba

• honey bee

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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 states a difference between an animal and an amoeba?

• An animal is made up of only one cell and an amoeba is made of many cells.
• An animal is found on land and an amoeba is found in water.
• An amoeba is single-celled and an animal is multicellular.
• An animal is a living organism and an amoeba is a non living organism

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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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Fungi and bacteria are both single-celled organisms. What do they most likely have in common?

• Both fungi and bacteria are large organisms.
• Both fungi and bacteria can carry out all life functions in their one cell.
• Both fungi and bacteria need sunlight and nutrients from the soil to be able to grow.
• Both fungi and bacteria are highly specialized to do only one job so they must work with other cells to obtain food.

This organism can only be seen through a microscope. In addition, it does not depend on other cells to survive. It can independently perform all of its major functions needed to survive.

Which best describes this organism?

• single celled organism

• multicelled organism

• complex organism

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Which characteristic do single-celled organisms and multicellular organisms have in common?

• Both have cells with specialized functions for each life process.

• Both perform all life processes within one cell.

• Both have a way to get rid of waste materials.

• Both are able to make food from sunlight.