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| cummulative organisms in a particular area. |
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| a level of ecological study that includes all the organisms in a given area as well as the abiotic (non-living) factors with which they interact. (community + physical environment) |
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| major types of communities and ecosystems recognizable in a large geographic area. |
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| principle that living organisms derived only from living organisms |
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| gaining of electrons by a substance involved in a redox reaction (chemical reaction involving transfer of one or more elections from one reactant to another) a.k.a. oxidation-reduction reaction |
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| a cell that lacks a nuclear membrane and membrane bound organelles. found only in domain Bacteria and Archaea. |
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| a cell with membrane bound nucleus and membrane bound organelles. present in protists, plants, fungi, and animals. |
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| branch of biology concerned with naming and classifying the diverse forms of life. |
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| all the changes that have transformed life on Earth from its earliest beginnings to the diversity that characterizes it today. |
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| differential success in reproduction of different phenotypes resulting from interaction of organisms withtheir environment. evolution occurs when natural selection causes changes in relative frequencies of alleles in the gene pool. |
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| process of coming to a conclusion after examining facts or examples. |
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| system of reasoning based on definitions |
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| an educated guess, can be tested through the use of experimentation. |
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| A scientific principle that invariably holds true under specific conditions |
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| a hypothesis that has withstood extensive testing using many methods. |
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| statement assumed to be true |
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| comparison group of study participants who do not receive the treatment in order to compare the tested group with the norm. |
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| observable characteristics that vary among individuals. |
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| the group of individuals that receives the treatment. |
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| variable measured that is the outcome of the treatment. |
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| variable that is changed to see if there is an effect |
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