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| natural phenemenon repeatedly confirmed by observation |
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| suggested, testable answer to a well-defined scientific question |
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| well-tested explanation that makes sense of a great variety of scientific observations |
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| description of how a natural phenomenon will occur under certain circumstances |
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| generation to generation change in the proportion of different inherited genes in a population that accounts for all of the changes that have transformed life over an immense time |
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| inherited characteristic that improves an orgamism's ablity to survive and reproduce in an environment |
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| descent with modification |
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| process by which descendents of ancestral organisms spread into various habitats and accumulate adaptions to deverse ways of life |
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| process by which individuals with inherited characteristics well-suited to the environment leave more offspring than do other imdividuals |
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| preserved remains or markings left by an organism that lived in the past |
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| chronological collection of life's remins in sedimentary rock layers |
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| no longer existing as a living species on Earth |
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| similar structure found in more than 1 species that share a common ancestor |
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| reminant of a structure that may have had an important function in a species' ancesters, but has no clear function in the modern species |
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| group of individuals of the same species living in a particular area at the same time |
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| difference amoung members of a species |
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| selective breeding of domesticated plants and animals to produce offspring with desired genetic traits |
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| all of the alleles in all the individuals that make up a population |
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| evolution on the smallest scale, a generation to generation change in the frequency of alleles within a population |
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| Hardy-Weinberg equilibrium |
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| condition that occurs when the frequency of alleles in a particular gene pool remain constant over time |
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| change in the gene pool of a population due to change |
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| exchange of genes between populations |
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| contribution that an individual makes to the gene pool of the next generation cmompared to the contributions of other individuals |
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| medicine that kills or slows the growth of bacteria |
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