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| structures that serve no purpose or function in an organism |
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| preserved remains or evidence of an ancient organism |
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| process, also known as divergent evolution, in which one species gives rise to many species that appear different externally but are similar internally |
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| evolution in which parts of different organisms, often quite dissimilar, that developed from the same ancestral body parts |
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| structures that are similar in appearance and function but have different origins and usually different internal structures |
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| pattern of evolution, also known as adaptive radiation, in which one species gives rise to many species that appear different but are similar internally |
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| phenomenon in which adaptive radiations among different organisms produce species that are similar in appearance and behavior .....opposite of divergent evolution |
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| Separation of population as that they do not interbreed and produce fertile offspring (weaker organisms) |
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| how new species evolve from old ones |
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| surrounding things, conditions or influences |
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| process in nature that results in the most fit organisms producing offspring |
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| technique in which the intervention of humans allows only selected organisms to produce offspring |
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| process that enables organisms to become better suited to their environments |
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| process in which a single organism produces a new organism or organisms identical to itself |
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| change in the number or structure of chromosomes in a cell |
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| Scientist that invented the theory of evolution |
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| process by which modern organisms have descended from ancient organisms; any change in the relative frequencies of alleles in the gene pool of population |
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| the study of organisms in the early stage of development |
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| combination of physical traits and behaviors that help an organism survive and reproduce in its environment |
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| Common group of genes shared by members of a population |
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| random change in the frequency of a gene |
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| they study of the physical history of the Earth |
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| change involving the nucleotides of DNA |
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| segment of DNA that codes for a particular protein |
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| Change in the genetic material of a cell |
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| process in which two cells, normally from different individuals, unite to produce the first cell of a new organism |
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| group of organisms that share similar characteristics and can interbreed with one another to produce fertile offspring |
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| principle that states that only individuals with characteristics best suited to their environment survive the struggle for existence |
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