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Chapter 1 Section 1 Terms

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Term
Definition
biology   the study of life  
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organization   the high degree of order within an organism's internal and external parts and in its interactions with the living world  
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cell   the smallest unit that can perform all of life's processes  
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unicellular   one celled organisms  
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multicellular   multi celled organisms  
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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 the functions necessary for the cell to stay alive  
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biological molecule   the chemical compounds that provide physical and that bring about movement, energy use, and other cellular forms  
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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   he 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   the process of producing new organisms just like themselves  
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gene   a short segment of DNA that contains the instructions for a single trait for an organism  
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