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Adaptation
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a characteristic that helps an organism survive in its environment
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Adaptation
a characteristic that helps an organism survive in its environment
Evolution
"the process by which populations accumulate inherited changes over time"
Fossil
the solidified remains or imprints of a once-living organism
Fossil record
a historical sequence of life indicated by fossils found in layers of the Earth's crust
Generation time
"the period between the birth of one generation and the birth of the next generation"
Mutation
"a change in the order of the bases in an organism's DNA; deletion, insertion, or substitution"
Natural selection
"the process by which organisms with favorable traits survive and reproduce at a higher rate than organisms without the favorable trait"
Selective breeding
the breeding of organisms that have a certain desired trait
Speciation
"the process by which two populations of the same species become so different that they can no longer interbreed"
Species
"the most specific of the seven levels of classification; characterized by a group of organisms that can mate with one another to produce fertile offspring"
Trait
a distinguishing quality that can be passed from one generation to another
Vestigial structure
the remnant of a once-useful anatomical structure
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