Unicellular and Multicellular Organisms

What does unicellular mean?

• Many cells

• 2 cells

• 1 cell

• 0 cells

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What is an organism?

• A dead animal

• A living thing

• A pencil

• A shoe

Which of the following is a single-celled organism?

• Dog

• Snail

• Amoeba

• hat

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Which one is NOT a life process?

• Get rid of waste

• Nutrition/Energy

• Shake it off

• Grow and develop

What is the difference between multi-celled and single-celled’s organisms?

• Single-celled organisms are “simple” and multi-celled organisms are “crazy.”

• Single-celled organisms are “super” and multi-celled organisms are “complex.”

• Single-celled organisms are “simple” and multi-celled organisms are “complex.”

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True or False:

Single-celled organisms are able to live as one cell, and multi-celled organisms need many cells to live because each cell has specialized job.

• True

• False

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Why does a human require specialized cells to live?

• Specialized cells allow humans to adapt to changes in their environment.

• Human bodies have several body systems which require cells with different functions/jobs.

• Specialized cells allow for all life processes to occur in one cell.

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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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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.

Sue and Allie read about different kinds of organisms. They read about an organism with a respiratory system, digestive system, skeletal system, and muscular system. Which can Sue and Allie most likely conclude about this organism?

• The organism is unicellular.
• This organism is microscopic.
• The organism is multicellular.
• The organism does not have any cells.

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