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Levels of organization terms and definitions

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Question
Answer
Cell   The basic unit of structure and function in living things  
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Structure   An organism’s body plan, or the way its parts are arranged  
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Function   The job or process that an organism’s structure carries out  
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Nucleus   The control center of the cell that directs the cells’ activities and determines the cell’s characteristics  
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Tissue   A group of similar cells that perform a specific function in an organism  
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Organ   A structure in the body that is composed of different kinds of tissue  
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Organ system   A group of organs that work together to perform a major function in the body  
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Homeostasis   The process by which an organism’s internal environment is kept stable in spite of changes in the external environment  
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Stimulus   A change in an organism’s surroundings that causes the organism to react  
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Response   An action or change in behavior that occurs as the result of a stimulus  
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Stress   The reaction of a person's body and mind to threatening, challenging, or disturbing events  
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4 Levels of Organization in the body   Cell, Tissue, Organ, Organ System  
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Created by: bmercer
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