Levels of Biological Organization

What is a cell?

• the basic unit of life

• a group of tissues working together to perform a function

• the largest level of biological organization

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The skin is an example of what level of biological organization?

• cell

• organ

• tissue

• organism

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Why are all cells different?

• all cells are the same

• different cells perform different functions

• multicellular organisms can live with one type of cell

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Which one is an example of a multicellular organism?

• tree

• bacteria

• protezoa

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What is a unicellular organism?

• an organism that can live with only one cell

• an organism with more than one cell

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What level of biological organization is the largest (includes all other levels)?

• organ

• organ systems

• organism

• cells

Blood is an example of what level of organization?

• cell

• tissue

• organ

• organ system

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Justin has learned that the brain, spinal cord, and peripheral nerves work together. What do they combine to form?

• a cell

• organ

• tissue

• organ system

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Which of the following is the correct order of organization in living things from the most basic (simple) to the most complex?

• Organism, cell, tissue,organ, organ system

• Organ system, organ, cell, organism, tissue

• cell, organ, tissue, organ system, organism

• cell, tissue, organ, organ system, organism

What is the difference between a cell and a tissue?

• cell is basic unit of life; tissue is group of cells that work as one

• cell is basic unit of life; tissue is groups of different cells

• cell is group of tissues; tissue is basic unit of life

• cell is group of organs; tissue is group of different cells

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