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Chapter 1-1 vocabulary

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Term
Definition
Biology   The study of life  
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Organization   High degree of order within an organisms internal and external parts and in its interactions with the living world  
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Cell   The smallest unit that can perform all lifes processes  
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Unicellular   Organisms made up of one cell  
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Multicellular   Organisms made up of multiple cells  
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Organ   Structures that carry out specialized jobs within an organ system  
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Tissue   Groups of cells that have similar abilities and that allow the organ to function  
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Organelle   Tiny structures that carry out functions necessary for the cell to stay alive  
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Biological molecule   The chemical compounds that provide physical structure and that bring about movement, energy use, and other cellular functions  
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Homeostasis   The maintenance of a stable level of internal conditions even though environmental conditions are constantly changing  
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Metabolism   The sum of all the chemical reactions that take in and transform energy and materials from the environment  
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Cell division   The formation of two new cells from an existing cell  
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Development   The process by which an organism becomes a mature adult  
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Reproduction   All organisms produce new organisms like themselves  
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Gene   A short segment of DNA that contains the instructions for a single trait of an organism  
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Cytology   The study of cells  
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Domain   Three major subdivisions of all organisms  
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Kingdoms   Divides all life into six major categories  
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Ecology   The branch of biology that studies organisms interacting with each other  
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Ecosystem   Communities of living species and their physical environments  
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Evolution   The inherited characteristics within populations change over generations  
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Natural Selection   Organisms that have certain favorable traits are better able to survive and reproduce successfully than organisms that lack these traits  
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Adaption   Traits that improve an individual's ability to survive and reproduce  
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Scientific Method   Learn how the natural world works  
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Observation   The act of perceiving a natural occurrence that causes someone to pose a question  
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Hypothesis   Educated guess  
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Prediction   Statement that forecasts what would happen in a test situation if the hypothesis were true  
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Experiment   Used to test hypothesis and predictions  
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Control Group   Provides the normal standard against which the biologist can compare results of the experimental group  
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Experimental Group   Identical to control group except for one factor  
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Independent Variable   The factor that is changed from the control group and the experimental group  
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Dependent Variable   Affected by the independent variable  
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Theory   A set of related hypotheses is proven to be true many times  
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Peer Review   Scientists anonymously read and review other scientists work  
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Created by: cjangard
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