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 function of both multi-celled and single-celled organisms?

• to create specialized tissues

• to rely on specialized cells to complete certain tasks

• to obtain energy from nutrients to maintain life and growth

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Which is a multi-cellular organism?

• algae

• cricket

• bacteria

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Fish are multi-celled organisms with specialized cells. What would most likely happen if their specialized cells did not function properly?

• The fish would decrease in size.

• The fish would increase in size.

• The fish would die.

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Which of the following states a difference between single-celled organisms and multi-celled organisms?

• Single-celled organisms are dead while multi-celled organisms are alive.

• Single-celled organisms do not have organs while multi-celled organisms have organs.

• Multi-celled organisms are made up of cells performing the same function while single-celled organisms are not.

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Which characteristic best describes both amoebas and bacteria?

• abiotic

• multi-celled

• single-celled

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Why do humans require many different types of cells to survive?

• Human cells are identical and work together to perform the same function.

• Human cells are specialized and work together to perform the same function.

• Human cells are identical and work independently to perform different functions.

• Human cells are specialized and work independently to perform different functions.

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