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In what way are both humans and bacteria the same?

• Both are living things.
• Both are non-living things.
• Both are multicellular organisms.
• Both are single-celled organisms.

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Which best describes a snake?

• A snake is made up of one cell that carries out one life process at a time.
• A snake is made up of many cells that carry out one life process at a time.
• A snake is made up of one cell that carries out many different life processes when needed.
• A snake is made up of many cells that carry out many different life processes when needed.

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An organism has several major body systems that work together to allow the organism to survive. Which best describes this organism?

• It is a single-celled organism.
• It is a multi-celled organism.
• It is a simple organism.

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Which statement describes the cellular makeup of a deer?

• Deer are made of one cell that carries out one life process.
• Deer are made of one cell that carries out all different life processes.
• Deer are made of many cells that are specialized to carry out different life processes.
• Deer are made of many cells that carry out one life process. 

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Which characteristic best describes both amoebas and bacteria?

• abiotic
• multi-celled
• single-celled
• inorganic

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The smallest unit of a living thing that can carry out the basic processes of life.

• cytoplasm
• atom
• chlorophyll
• cell

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What tool do you use to view cells?

• metric ruler
• magnifying glass
• microscope
• petri dish

How is it possible for single-celled organisms to survive?

• They are small and can easily avoid predators.

• They have all of their needs met within one cell.

• They have adapted to live only in specific environments.

• They depend on other cells to obtain food, water, and other resources.

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Which is an example of a single-celled organism?

• amoeba

• insect

• fish

• worm

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Why do multicellular 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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