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| The basic building blocks of life. |
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| A change in the environment which triggers a reaction (in an organism). |
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| All the chemical reactions in an organism--breaking down/building up chemicals, absorbing/releasing energy, etc |
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| (maintained) Constant internal environment. |
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| Organim which takes energy directly from the sun using photosynthesis. |
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| Organism which gets energy from eating other organisms. |
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| The process in which producers combine carbon dioxide with water and energy from the sun, to produce glucose (with oxygen as a byproduct). |
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| A bunch of cells working together at the same job (EX: muscle tissue, nerve tissue, etc) |
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| Tissues organized together to do a specific job (EX: heart, lungs, liver, etc) |
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| A group of organs together: an organism's body. |
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| A small, simple cell with no nucleus or membrane bound organelles. (Includes Bacteria and Cyanobacteria) |
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| Small cells that are usually found in extreme environments. These are similar to prokaryotes in structure, and similar to eukaryotes in biochemisty. |
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| A large, organized and complex cell which contains a nucleus. Most organisms are made up of eukaryotes. |
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| Bacteria which can carry out photosynthesis. |
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| The highest kind of organisms, including three groupings: Archaea, Bacteria and Eukarya |
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