2/14/08
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| neuron | a nerve cell that is specialized to receive and conduct electrical impulses
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| emigration | the moving of an individual or group out of an area
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| omnivore | eats plants and animals
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| gestation | in mammals, the process of carrying young from fertilization to birth
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| oncogene | a gene that induces cancer, or uncontrolled cell proliferation
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| succession | a series of stages a community goes through before it reaches its most stable stage
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| biosphere | the part of the earth where life exists; includes all of the living organisms on earth
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| community | a group of various species that live in the same habitat and interact with each other
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| population | a group of organisms of the same species that live in a specific geographical area and interbreed
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| permafrost | in arcitc regions, the permanently frozen layer of soil or subsoil
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| acclimation | an organism's change in response to a change in the organisms environment
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| ecosystem | a community of organisms and their abiotic environment
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| appendages | a structure that extends from the main body, such as a limb, tentacle, fin, or wing
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| fermentation | the breakdown of carbohydrates by enzymes, bacteria, yeasts, or mold in the absence of oxygen
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| prehensile | can grasp objects, as in primate's hand, foots, or tail
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| trophic level | an organism's relative position in a sequence of energy transfers in a feed chain or food pyramid
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| leucocyte | a white blood cell
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| phylogeny | the evolutionary history of a species or taxonomic group; the relationships by ancestry among taxonomic groups
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| viviparous | an organism whose offspring develop within the mother's body and are born alive
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| opposable thumb | in primates, a thumb that can touch and move in opposition to the other fingers of the hand
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