Multicellular and Unicellular

Which best describes the main job of most cells in multicellular organisms?

• Cells work to keep themselves alive.
• Cells work to keep the organism alive.
• Cells work to release needed materials.
• Cells work to store unneeded materials.

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Which organism performs all life processes in one cell?

• grass
• bacteria
• mushroom
• butterfly

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Which best explains why humans are multicellular organisms?

• Human cells are too small to function alone.
• Human cells join together to form one large cell.
• Humans need many cells to carry out life processes.
• Humans have many systems that perform the same function.

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Molly is reading a book in science class. She reads one sentence that says, “This organism is capable of surviving as a single cell.” Which organism is she most likely reading about?

• amoeba
• flower
• mushroom
• insect

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How are algae able to survive?

• The algae get energy from other algae.
• The algae do not require energy to survive.
• The single cell controls all the algae’s life processes.
• Other multi-celled organisms provide food for the algae.

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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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Which best explains why both cats and humans are multicellular organisms?

• They get energy from many food sources.
• They get energy from a single food source.
• They need only one cell to meet their basic needs.
• They need many cells working together to meet their basic needs.

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Which is a difference between frogs and bacteria?

• Frogs are able to control all life processes in one cell, while bacteria cannot.
• Frogs are single-celled organisms, while bacteria are multi-celled organisms.
• Frogs are multi-celled organisms, while bacteria are single-celled organisms.
• Frogs must rely on other single-celled organisms for survival, while bacteria are dependent only on themselves.

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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 of the following must get nutrients from a transport system?

• bacteria 
• amoeba
• fungi
• nerve cell

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