Multi and unicellular organisms

Which is an example of a single celled organism?

• amoeba

• insect

• fish

• worm

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Why do multi-cellular organisms need transport systems?

• most have cells that are not able to exchange gases with the outside environment

• most have cells that are unable to grow and survive in their environment

• most have cells that need food from sources outside their environment

• most have cells that require more energy to survive than single celled organisms

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Which statement best describes a bacterial cell?

• It contains more than one cell

• It is a complete organism

• It is part of a larger organism

• It contains different kinds of cells

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Which characteristics do single-celled organisms and multi-celled organisms have in common?

• Both have cells with specialized functions for each 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.

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A scientist is trying to decide whether an organism is unicellular or multi-cellular. 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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Which of the following is a multi-cellular organism?

• yeast

• bacteria

• ameoba

• human

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Knowing how many cells an organism is composed of allows us to classify it into one of which two groups?

• plant/animals

• carnivore/herbivore

• producer/consumer

• unicellular/multi-cellular

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How are the cells in multi-celled organisms different than single-celled organisms?

• They perform special functions.
• They form tissues, organs, and organ systems.
• They come in many different types.
• All of the above.

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Which statement best describes one-celled organisms?

• they carry out all the basic processes of life
• they do not get rid of waste
• they do not need to take in nutrients
• they work together to do certain jobs

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Which best compares bacteria and sharks?

• bacteria are unicellular, and sharks are multicellular
• bacteria are multicellular, and sharks are unicelluluar
• bacteria have transport systems, while sharks do not
• bacteria reproduce, while sharks do not 

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