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| A characteristic that helps an organism survive in its environment |
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| The most specific of the seven levles of classification ; charaterized by a group of organisms that can mat with each other to produce fertile offspring |
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| The process by which populations accumukate inherited chnages over time |
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| The solidified remains or imprints of a onceliving organism |
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| Historical sequence of life indicated by fossils found in layers of the Earth's crust |
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| The remnant of a one-useful anatomical structure |
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| Distinguishing quality that can be passed from one generation to another |
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| The breeding of organisms that have a certain desired trait |
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| Process by which organisms with favorable traits survive and reproduce at a higher rate than organisms without favorable traits |
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| Change in the order of the bases in an organisms DNA; Deletion, Insertion, Substitution |
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| Time period between the birth of one generation and the birth of the next genertation |
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| Process by which two populations of the same species become so different that they can no longer interbreed |
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