Levels of organization of organisms

Which of the following statements is not part of the cell theory?

• Cells are the basic unit of structure and function in all living things.

• All cells are produced from other cells.

• Only animals are composed of cells.

• All living things are composed of cells.

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Basic unit of life

• Cell
• Tissue
• Organ
• Organ System

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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 best describes a multi-celled organism?

• basic
• simple
• uniform
• complex

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How are single-celled organisms and multi-celled organisms similar?

• Both need food for energy and growth.
• Both have a skeletal system for support.
• Both require the interaction of many cells to survive.
• Both are able to carry out all life functions in only one cell.

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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.

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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A scientist is trying to decide whether an organism is unicellular or multicellular.  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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An unspecialized cell that can develop into many different cell types is called a/an _____.

• tissue
• organ
• stem cell
• organ system

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Which is true of unicellular organisms?

• they lack cells
• they all are eukaryotic
• they lack cell differentiation

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