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| membrane-covered structure that contains all the materials necessary for life |
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| the membrane-covered organelle found in eukaryotic cells; contains the cell's DNA and serves as a control center for the cell |
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| the arrangement of organisms into orderly groups based on their similarities and presumed evolutionary relationships |
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| the science of identifying, classifying, and naming living things |
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| evolutionary history of an organism; used today to group organisms into six kingdoms |
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| two-word naming system that gives all organisms their scientific name |
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| the non-scientific name by which a species is known |
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| the recognized Latin name given to an organism, consisting of a genus and species |
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| the most general of the seven levels of classification |
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| the level of classification after kingdom; the organisms from all the kingdoms are sorted into several phyla. |
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| the level of classification after phylum; the organisms in all phyla are sorted into classes. |
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| the level of classification after class; the organisms in all the classes are sorted into orders. |
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| the level of classification after order; the organisms in all orders are sorted into families. |
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| the level of classification after family; the organisms in all families are sorted into genera. |
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| the most specific of the seven levels of classification; characterized by a group of organisms that can mate with one another to produce fertile offspring |
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| an aid to identifying unknown organisms that consists of several pairs of descriptive statements; of each pair of statements, only one will apply to the unknown organism, and that statement will lead to another set of statements, and so on, until the unknown organism can be identified. |
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| a classification kingdom containing bacteria that thrive in extreme environments |
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| a classification kingdom containing mostly free-living bacteria found in many varied environments |
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| a kingdom of eukaryotic single-celled or simple, multicellular organisms; kingdom Protista contains all eukaryotes that are not plants, animals or fungi. |
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| the kingdom that contains plants--complex, multicellular organisms that are usually green and use the sun’s energy to make sugar by photosynthesis. |
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| a kingdom of complex organisms that obtain food by breaking down other substances in their surroundings and absorbing the nutrients |
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| the classification kingdom containing complex, multicellular oganisms that lack cell walls, are usually able to move around, and possess nervous systems that help them be aware of and respond to their surroundings |
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| an organism that cannot manufacture its own food and instead obtains its food and energy by taking in organic substances, usually plant or animal matter; includes all animals, protozoans, fungi, and most bacteria |
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| an organism capable of synthesizing its own food from inorganic substances using light or chemical energy; includes green plants, algae, and certain bacteria |
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