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Biology Sec. 1
Term | Definition |
---|---|
biology | the study of life |
cell | the smallest unit that can perform all of life's processes |
unicellular | describes an organism that consists of a single cell |
multicellular | describes an organism that consists of multiple cells |
organs | structures that carry out specialized jobs within an organ system |
tissues | groups of cells that have similar abilities and that allow the organ to function |
organelles | tiny structures that carry out functions necessary for the cell to stay alive |
biological molecules | the chemical compounds that provide physical structure and that bring about movement, energy use, and other cellular functions |
homeostasis | the maintenance of a stable level of internal conditions even though environmental conditions are constantly changing |
metabolism | the sum of all the chemical reactions that take in and transform energy and materials from the environment |
cell division | the formation of two new cells from an existing cell |
development | the process by which an organism becomes a mature adult |
reproduction | the process of producing offspring |
gene | a short segment of DNA that contains the instructions for a single trait of an organism |
organization | the high degree of order within an organisms internal and external parts and in its interactions with the living world |